Q. 54.7( 14 Votes )

a, b ,c are in continued proportion. If a = 3 and c = 27 then find b.

Answer :

Given: a, b, c are in continued proportion.


Three numbers ‘a’, ‘b’ and ‘c’ are said to be continued proportion if a, b and c are in proportion,


i.e. a:bb:c


or b2 = ac


Here, a = 3, c = 27


(b)2 = 3 × 27


b2 = 81


b = √81 = 9


b = -9 or 9


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