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Online Quiz (Worksheet A B C D)

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Grade 6 - Mathematics
7.2 Find if the Given Numbers are in Proportion

If four numbers are in proportion then
The product of extremes = The product of means

That is, if a:b = c:d, then axd = bxc.

Example: 2:5 = 10:25 -- Is this proportion correct?
Product of extremes = 2 x 25 = 50.
Product of means = 5 x 10 = 50.
Since, Product of extremes = Products of means, the numbers 2:5 = 10:25 are in proportion.

Directions: Find if the given numbers are in proportion. Also write at least ten examples of your own.
Q 1: 15:20 = 225:300 -- are they in proportion?

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