The figure below is made up of two squares, RSTQ and PQVW, and a rectangle TUVW. <hr> Given that the length of PV is $$\frac{2}{3}$$ of the length of RS, find the length of PV. <br> PV = <input min="0" type="number" id ="imp4pg125q8_1" class="lineinput" placeholder="?" /> cm