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Browse Middle School Ratio/Proportion
Stars indicate particularly interesting answers or
good places to begin browsing.
Selected answers to common questions:
Mixture problems.
Unit conversions, unit cancellation.
What is a ratio?
 Weighted Averages [11/30/2001]

An advertisement for an orange drink claims that the drink contains 10%
orange juice. How much pure orange juice would have to be added to 5
quarts of the drink to obtain a mixture containing 40% orange juice?
 Which is More? [05/21/2002]

Given a choice between nickels stacked to your height, or quarters
placed end to end to your height, which should you choose?
 Why Does Cross Multiplication Work? [05/09/2002]

Why does the rule a/b = c/d also mean ad = bc? Why can we solve
proportions by cross multiplying?
 Why There are 12 Tones in a Scale [12/28/2000]

Why are there 12 tones in an octave? Can you explain the significance or
the equation r^n = 2^m? Also, what's so special about a fifth? Why should
the scale be based on the fraction 3/2?
 Working with MultiPart Ratios [05/21/2007]

Can you explain how to work with a threepart ratio such as 2:3:6? I
understand basic ratios but am not sure how the various numbers relate
to each other when there are more than two of them.
 Writing Ratios [06/03/1999]

How can I write a ratio in three different ways?
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