My usual way to do this is to define a:b = b:c = c:d = k, and express a, b, and c in terms of k and d. Then put these into the desired ratio, and simplify. It is not very hard this way.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.