History of Hindu Mathematics: A Source Book v1.c8.s12.11

v1.c8.s12.11

“In the Rule of Three *pramâṇa* (“argument”), *phala* (“fruit”) and *icchâ* (“requisition”) are the (given) terms; the first and the last terms must be similar. The *icchâ* multiplied by the *phala* and divided by the *pramâṇa* gives the fruit (of the demand).”¹