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Houghton Mifflin Harcourt
Houghton Mifflin Harcourt: Saxon Activity Center: Graphing Calculator Activity: Proportions [Pdf]
A concise graphing calculator lesson on proportions. Detailed examples, demonstrations of functions, and practice problems included. Acrobat Reader required.
Wyzant
Wyzant: Basics of Proportions
This tutorial from WyzAnt on proportions describes in detail the functions of proportions and includes several examples to demonstrate how to solve proportions. The tutorial is concluded with an interactive worksheet that allows for...
Calculator Soup
Calculator Soup: Ratio Calculator
The ratio calculator performs three types of operations and shows the steps to solve. It simplifies ratios or creates an equivalent ratio when one side of the ratio is empty, solves ratios for the one missing value when comparing ratios...
Calculator Soup
Calculator Soup: Fractions Solve for Unknown X
Solve for an unknown value x with this fractions calculator. Find the missing fraction variable in the proportion using cross multiplication to calculate the unknown variable x. Solve the proportion between 2 fractions and calculate the...
Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: Proportions
Find a quick, concise explanation of proportions. An example is given and clearly explained.