# Geometric Series

*Math & Statistics — Finicade finance glossary*

A sum where each term is a fixed multiple of the last. When the multiple is below one it converges to a tidy finite total — the maths behind pricing perpetuities and annuities.

**Also known as:** geometric-sequence, finite-series-sum

**Related terms:** [Perpetuity](https://finicade.com/glossary/perpetuity), [Annuity](https://finicade.com/glossary/annuity), [Compound Interest](https://finicade.com/glossary/compound-interest)

**Taught in:** Math Masters — Geometric Series & the Perpetuity

Source: https://finicade.com/glossary/geometric-series