Question

assume a, b and c are in continued proportion; find a if b = 15 and c = 40​

Answer 1

Step-by-step explanation:

This means that a:b = b:c

b = 15 and c = 40 , a = ?

Now,

Product of the extremes = Product of the means

So,

a × c = b × b

a × 40 = 15 × 15

a × 40 = 225

a = 225/40

\textbf{a = 5.625}

Answer 2

And the answer is 5.625

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