Geometric Sequence

Pronunciation: /ˌdʒi.əˈmɛt.rɪk ˈsi.kwəns/ Explain

A geometric sequence is a sequence of numbers with a common ratio. For example, the geometric sequence { 1, 3, 9, 27, … } has a common ratio of 3, since 1 · 3 = 3, 3 · 3 = 9, and 9 · 3 = 27.

A geometric sequence is also called a geometric progression. A geometric sequence is the same thing as a geometric progression.


  1. McAdams, David E.. All Math Words Dictionary, geometric sequence. 2nd Classroom edition 20150108-4799968. pg 85. Life is a Story Problem LLC. January 8, 2015. Buy the book
  2. Jones, Burton. Elementary Concepts of Mathematics. pp 124-133. MacMillan and Company. 1947. Last Accessed 7/11/2018. Buy the book
  3. Underwood, Ralph S.; Nelson, Thomas R.; Selby, Samuel. Intermediate Algebra. pp 227-232. The Macmillan Company. 1947. Last Accessed 7/11/2018. Buy the book

Cite this article as:

McAdams, David E. Geometric Sequence. 4/21/2019. All Math Words Encyclopedia. Life is a Story Problem LLC.

Revision History

4/21/2019: Updated equations and expressions to new format. (McAdams, David E.)
12/21/2018: Reviewed and corrected IPA pronunication. (McAdams, David E.)
7/10/2018: Removed broken links, updated license, implemented new markup, implemented new Geogebra protocol. (McAdams, David E.)
2/6/2010: Added "References". (McAdams, David E.)
8/2/2008: Added paragraph on geometric progression. Added More Information (McAdams, David E.)
7/12/2007: Initial version. (McAdams, David E.)

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