Zirconium phosphate `[Zr_3(PO_4)_4]` dissociates into three zirconium cations of charge +4 and four phosphate anions of charge -3 . If molar solubility of zirconium phosphate is denoted by S and its solubility product by `K_(sp)` then which of the following relationship between `S and K_(sp)` is correct ?