Question

find the fourth proportional to 7, 3 and 42​

Answer 1

Answer:

98

Step-by-step explanation:

98

In a:b::c:d;d is the fourth proportional.

For, 3:42::7:d, product of extremes = product of means

3×d=42×7

d=98

Answer 2

$\huge\sf\tt\red{AnSwEr}$

$\sf\tt{In\: a:b::c:d;d\: is\: the\: fourth\: proportional}$

$\sf\tt{For\:, 3:42::7:d,\: product\: of \:extremes\: = product\: of\: means}$

$\sf\tt{3\:×\: d\:=\:42\:×\:7}$

$\sf\tt{d=98}$