what-is-a-proportion-three-ways-to-solve-proportions

A proportion is an equality of two ratios. I present three different ways to solve proportions:

(1) Use a table of equal ratios.

(2) Think "horizontally", the same way you would with equivalent fractions.

(3) Cross-multiplying.

Check out also my other pre-algebra videos at

http://www.mathmammoth.com/videos/prealgebra/pre-algebra-videos.php

Tagged under: cross-multiplying,cross-multiplication,proportion,equal ratios,7th grade,math,pre-algebra

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