If you stick to floats and arrays of floats, Fortran is probably still faster.

But Common Lisp and fully conformant Schemes have an extensive numeric tower including arbitrary precision integers, rationals, and complex numbers built in, making Lisp useful for some kinds of numeric computing that would be cumbersome even in Fortran.

Plus, I once heard of a guy who wrote an FFT implementation in Gambit Scheme that beat FFTW in speed...