A natural number is divided into two positive unequal parts such that the ratio of the original number to the larger (divided) part is equal to the ratio of the larger part to the smaller part. What is the value of this ratio?   (51/2 − 1)   (51/2 + 1) / 2   (51/2 + 1) / 4   (51/2 + 1) / (51/2 − 1)   (51/2 + 3) / (51/2 − 1)   Hint Half-n-half Clue