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Finding the Fourth Proportional to 913.50, 1,370.19 and 731.25

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Solution

The fourth proportional to 913.50, 1,370.19 and 731.25 is: 1,096.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    913.50 : 1,370.19 = 731.25 : x
  2. Step 2: Convert to fraction form
    913.50/1,370.19 = 731.25/x
  3. Step 3: Cross multiply
    913.50x = 1,370.19 × 731.25
  4. Step 4: Simplify right side
    913.50x = 1,001,951.44
  5. Step 5: Solve for x
    x = 1,001,951.44/913.50
  6. Step 6: Final answer
    x = 1,096.83

Related Problems

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.