Proportions

Equivalent ratios lead to proportions. The video provides the definition of a proportion and provides examples of proportions. Using real-world examples, the resource shows how to solve for unknown quantities in proportions using the cross multiplying method.

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CCSS: Adaptable
Instructional Ideas

  • Conduct a lesson on why cross multiplying is a valid way to solve proportions
Classroom Considerations

  • The class should have a solid understanding of ratios
  • It is helpful if individuals can solve one-step multiplication equations
Pros

  • Highlights proportions must have the same units
  • Uses graphics to show the components involved in cross multiplying
Cons

  • None