Chapter 5 Lesson 2


An equation that states that two ratios are equal. If two quantities form a proportion they are said to be proportional.

To determine if a set of numbers are proportional:

  1. Use cross products - multiply diagonally across and see if your numbers are equal
  2. See if they form equivalent ratios - put both ratios in simplest form
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Methods of Determining if Proportions are True 5.3