Why does Jupiter have greater mass then other planets?

Jupiter is 2.5 times more massive than all of the other planets in our Solar System combined. Jupiter is actually so massive that if it gained much more mass it would shrink. Jupiter's intense gravity would pull additional rock tightly together shrinking the diameter of the planet and increasing its density.

Jupiter's mass is 2.5 times that of all the other planets in the Solar System combined—this is so massive that its barycenter with the Sun lies beyond the Sun's surface at 1.068 solar radii from the Sun's center. ... Jupiter would need to be about 75 times as massive to fuse hydrogen and become a star.

Ithink the answer would be 1,350!