Machine problem

In a screw jack one turn of the screw raises the load $13\ \rm mm$ . A lever $914\ \rm mm$ long is used to raise the load. It is found that $90\ \rm N$ applied at the end of the lever will just raise $1\ \rm tonne$ and that $155\ \rm N$ will just raise a load of $2\ \rm tonnes$ . Calculate what load a force of $250\ \rm N$ might be expected to raise if applied at the end of a lever $1220\ \rm mm$ long.