Re: [math-fun] Another approximation of pi

I did find a possible motivation for Ramanujan's approximation to pi. It would follow from the obvious rational approximation to zeta(4) = 1.08232323+ On 10/13/2012 4:32 PM, Eugene Salamin wrote:

A much more interesting approximation is Ramanujan's π = (2143/22)^(1/4), good to 9 places.