Question
What is the mean proportional between the fourth
proportionals of (1 , 2, 7) and (14, 16, 2401 )?Solution
Let fourth term in 1st case be x and in 2nd case be y 1/2 = 7/x β x = 14 14/16 = 2401/y β y = 2744 Now, Mean proportion = β(14 Γ 2744) β 196 β΄ Required answer is 196
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