Math Review: Fundamentals of Math

Making Conversions | Keywords in Word Problems | Taking Percentages | Scientific Notation | Integers | Fractions | Decimals (including percents) | Ratios and Proportions | Units of Measurement and Conversions | Miscellaneous Problems

Problems Involving Ratios and Proportions

  1. A jogger can run 2½ miles in 20 minutes.  At this same pace, how long would it take him to run a 24 mile marathon?

  2. A company charges $2.25 for every 3 feet of wire.  How much would 117 feet of wire cost?

  3. A student feels 16 pulse beats during a 10 second pulse reading immediately following an exercise.  What is this student's pulse rate in beats per minute?

  4. A driver observes that after driving 50 miles he has used ¼ of his 10 gallon tank.  How many gallons of gas should he anticipate using on a 280 mile trip?

  5. A company expects to find 3 defective parts out of every 2000 produced.  If at the end of the day a supervisor identifies 123 defectives parts, what was the total production for that day?

 

Answers.

  1. 3 hours 12 minutes
  2. $87.75
  3. 96 beats per minute
  4. 14 gallons
  5. 802 x 10 to the fourth power parts

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©2002, Last Updated: June 15, 2007
El Centro College
Communications, Mathematics, Developmental Studies, and Teacher Preparation Division