Can someone reply to my previous post.
I have been hunting for a good example.
See problem 3-2 on this, where they had to multipy by to to get a whole number ratio.
http://books.google.com/books?id=EKOBuCwHh9wC&pg=PA29&lpg=PA29&dq=empirical+formula+C3H8&source=web&ots=2XWO2gHpDo&sig=CQMIhjMo-rkgb0Quz5KGGpXXQMs&hl=en&sa=X&oi=book_result&resnum=3&ct=result#PPA30,M1