Question

find the fourth proportional of 7,9,63​

Answer 1

Answer:

81

Step-by-step explanation:

first term = 7 = a

second term =9 = b

third term =63 = c

fourth term = x = d

product of means x product of extreme

=  b x c                      a x d

= 9 x 63                     7 x x

x = 9 63    = 9 x 9 = 81

     7

x = 81 fourth term = 81