Question

1/5 : 1/7 : : __ : 1/9​

Answer 1

1/5 : 1/7 : : __ : 1/9

answer : 1/3

Answer 2

SOLUTION:--

IN PROPORTION WE KNOW THAT PRODUCT OF EXTREME = PRODUCT OF MEAN

LET THE UNKNOWN NUMBER = X

=》 1 × 1 = 1 × X

5 9 7

=》 1 = X

45 7

=》 X = 7

45

ANSWER :-- 7

45