In proportional sequences, the ratio of a term in the first sequence to the term of same rank in the second sequence.

The proportionality constant is equal to the inverse of the coefficient of proportionality.

### Example

Consider the following proportional sequences :

Sequence A | 2 | 4 | 6 | 8 | 10 | 12 | \(\frac{2}{7}\) |

Sequence B | 7 | 14 | 31 | 28 | 35 | 42 |

In this case, the proportionality constant is \(\frac{2}{7}\).