Curriculum
Course: Mathematics — First Preparatory
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Curriculum

Mathematics — First Preparatory

Unit 1: Numbers

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Unit 2: Algebra

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Unit 3: Statistics

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Unit 4: Geometry

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Text lesson

Ratio and Proportion

Mathematics — First Preparatory

Ratio and Proportion

Lesson summary

Lesson summary

  • A ratio compares two quantities of the same kind and the same unit. It is simplified by dividing both terms by a common factor.
  • A proportion is an equality of two ratios. It holds when the product of the extremes equals the product of the means.
  • The mean proportional b between a and c satisfies b² = a × c.
  • Proportions are used to find an unknown after the quantities are written in one unit.
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