What is a Proportion in Math? Calculate & Solve Proportions & Equations - [6-3-3]

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Twitter: / jasongibsonmath
In this lesson, you will learn what a proportion is, how to solve proportions, and how to calculate the value of a proportion. A ratio is the comparison between two numbers, and a proportion is when we set two ratios equal to one another. When we solve a proportion, we must learn how to solve an equation for the unknown variable. In this lesson, we describe what proportions are used for, how to set up a proportion as an equation, and how to use the concept of solving an equation to solve a proportion.

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Thank you for your teaching. In the numbers rational propotions they can also be solved in this way Ex: 3/5 =X/15 X=9 3/5 Molt 5X3=15 Molt 3X3=9 X=9 2EX : 1/2= X/6 2x3=6 3x1= 3 [X =3

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[@frankdimeglio8216]

@@MathAndScience E=mc2 is F=ma. This NECESSARILY represents, INVOLVES, AND DESCRIBES what is possible/potential AND actual IN BALANCE, AS ELECTROMAGNETISM/ENERGY IS GRAVITY. Gravity IS ELECTROMAGNETISM/energy, AS E=MC2 IS F=MA. The Earth (A PLANET) is a MIDDLE DISTANCE form that is in BALANCED relation to the Sun AND the speed of light (c), AS the stars AND PLANETS are POINTS in the night sky; AS E=MC2 IS F=MA; AS TIME DILATION ultimately proves ON BALANCE that ELECTROMAGNETISM/energy is gravity. Indeed, TIME is NECESSARILY possible/potential AND actual IN BALANCE; AS E=MC2 IS F=MA; AS ELECTROMAGNETISM/ENERGY IS GRAVITY. GRAVITATIONAL force/ENERGY IS proportional to (or BALANCED with/as) inertia/INERTIAL RESISTANCE, AS E=mc2 is F=ma; AS ELECTROMAGNETISM/ENERGY IS GRAVITY. Gravity/acceleration involves BALANCED inertia/INERTIAL RESISTANCE, AS E=MC2 IS F=MA ON BALANCE; AS ELECTROMAGNETISM/ENERGY IS GRAVITY. Accordingly, the rotation of WHAT IS THE MOON matches it's revolution. MOREOVER, a given PLANET (INCLUDING WHAT IS THE EARTH) sweeps out EQUAL AREAS in equal times consistent WITH/AS F=ma, E=mc2, AND what is perpetual motion; AS E=MC2 IS F=MA ON BALANCE; AS ELECTROMAGNETISM/ENERGY IS GRAVITY. By Frank DiMeglio

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You can also cross multiply to get the answer: 12 = 2w Just divide... w=6

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How you do x over 8 : 3 over For

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I think convention to represent a proportion is 2:3::4:6.

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difference between directly proportional and propotional

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1/2 x w/12

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2/3 x y/9

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1/2=w/12

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(3)15=45

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3(12)/4

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I don't know if it works with all numbers but I say 4 goes into 12 3x.. 3x 3=9

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1/4 x h/28

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Could you cross multiply to solve these problems?

[@MathAndScience]

Yes you could - however I don't like teaching it because cross multiplying hides what you are actually doing, and it is only applicable to this specific type of equation. What I am showing you here is "real" algebra and these skills will be used basically forever going forward solving more complex problems. I don't like "one off" solution techniques where you don't know why it works - here you understand exactly why every step works. Jason

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2/3=y/9

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Hi!

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9(2)=18

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36/4=9

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1/4=h/28

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2/3=6/9 / 3/3= 2/3

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45/5=9

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2/3=6/9 /3/3

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1/2x x/6

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9/3=3

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28/4=7