Posted by Bill on August 04, 1999 at 07:14:50:
In Reply to: Large Prime-Number Ratio posted by Ric Ashcraft on August 03, 1999 at 15:42:55:
The 6-gear set below is not an exact match to 1/431 ratio, but is in error by 0.000000000007
and is the best possible match to your target ratio without using a 431 tooth gear:
15/167 x 15/178 x 61/199
I ran this case on CPC-RATIO. Hope this helps.