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Question

Find the value of 𝑥 in each of the following such that the given numbers are in proportion.

(ii) 45,135,90 and x

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Solution

Step : Calculate the value of x
Given numbers are 45,135,90 and x.
If 45:135 is equal to 90:x then they are in proportion.

45:135=90:x
45×x=90×135
( Product of extremes = product of means)
x=90×13545=15×6×15×915×3
x=6×3×5×93
x=270
Hence, the value of x is 270.

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