Proportion Scenarios

Types of proportion scenarios

There are usually two types of proportion scenarios:

  • find a missing quantity (given a ratio of two quantities and one of the actual quantities)
  • compare two proportions (not covered here)

You can solve 'missing quantity' proportion questions using any of the following methods:

  1. writing and solving a proportion equation (an algebraic method)
  2. finding the equivalent ratio for one unit then multiply by the required number of units (the unitary method -- a non-algebraic method)
  3. first creating a table of values then building up or down to the required number of units by multiplying and/or dividing (another non-algebraic method).

Try these questions to test your understanding. You may want to review one or more of the methods mentioned above by following the links.