Question

if a:b=b:c=c:d=4:5 then a:d=?

Answer 1

the ans is 64:125 if u want the steps ask me

Answer 2

$a/b=4/5,b/c=4/5,c/d=4/5$
$a/d=a/b*b/c*c/d=4/5*4/5*4/5=64/125.$