The third proportional x2.5y1.5×z3.5\frac{x^{2.5}}{y^{1.5}}\times z^{3.5}y1.5x2.5×z3.5 and x0.25×y0.25z−0.25{x^{0.25}}\times \frac{y^{0.25}}{z^{-0.25}}x0.25×z−0.25y0.25 is __________
