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Question

If 5,x,45 and y are in continued proportion, find the values of x and y.


Solution

If ' x ' is Third Proportion of ' a ' and ' b ' .

Then ,

a : x = x : b

x² = ab

x = √ ab

According to the problem given,

a = 5 , b = 45

x = √ ( 5 × 45 )

=√ ( 5 × 5 ×9)

=5 ×3

=15

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