F$-5$ A granular soll was found to have the following dry densities:

$1500k\frac{g}{m^3}$ in the $1008$ state

$1670k\frac{g}{m^3}$ in the natural state

$1800k\frac{g}{m^3}$ in the dense state

If the specific gravity of the soll particles was $2\mathrm{.}64,$ what was the Relative Density?