It is known that the ratio of a to B to C is equal to two to three to four

It is known that the ratio of a to B to C is equal to two to three to four

1/a:1/b=2:3
Then B: a = 2:3
a: B = 3:2, two terms multiply by 2
a:b=6:4
1/b:1/c=3:4
So B: C = 4:3
So a: B: C = 6:4:3