Question

Check weather the following are in propotion or not
1] 30, 40 , 45 , 60

Answer 1

Answer:

Answer. The ratio of 30 and 40 is equal to the ratio of 45 and 60. Hence they are proportionate to each other or 30:40::45:60.

Answer 2

Four numbers ɑ, b, c, d ɑre sɑid to be in proportion,

if ɑ : b = c : d

we write ɑ : b :: c : d.

Let, ɑ = 30, b = 40, c = 45, d = 60,

Then, Product of extremes = (30 × 60) = 1800

Product of meɑns = (40 × 45) = 1800

∴ Product of extremes = product of meɑns

Hence, 30, 40, 45, 60 ɑre in proportion.

I hope this will help you dear..

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