3.4.1

Proportion

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Proportion

Two pairs of numbers are in proportion if the ratio between the first pair is equivalent to the ratio between the second pair.

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Ratios in proportion

  • An equals sign between two ratios means that the two ratios are in proportion.
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Worded problems

  • Worded problems can be converted into proportions.
  • ‘The ratio of male to female pupils on a school trip is 5 : 2’
    • This can be written as m : f = 5 : 2
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Proportions and fractions

  • Proportions can be converted into an equation involving fractions.

Jump to other topics

1Number

1.1Using Numbers

1.2Fractions, Decimals & Percentages

1.3Powers & Roots

1.4Accuracy

2Algebra

2.1Introduction to Algebra

2.2Manipulating Algebra

2.3Proofs & Functions

2.4Straight Line Graphs

2.5Common Graphs

2.6Transformations & Tangents

2.7Properties of Graphs

2.8Solving Equations

2.9Inequalities

2.10Sequences

3Ratio

4Geometry

4.1Introduction to Geometry

4.2Triangles & Quadrilaterals

4.3Transformations

4.4Circle Basics

4.5Circle Theorems

4.6Measurements & Units

4.7Calculating Area

4.8Triangle Formulae

4.93D Shapes

4.10Vectors

5Probability

6Statistics

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