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Finding the Fourth Proportional to 725.88, 1,084.11 and 628.68

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Solution

The fourth proportional to 725.88, 1,084.11 and 628.68 is: 938.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    725.88 : 1,084.11 = 628.68 : x
  2. Step 2: Convert to fraction form
    725.88/1,084.11 = 628.68/x
  3. Step 3: Cross multiply
    725.88x = 1,084.11 × 628.68
  4. Step 4: Simplify right side
    725.88x = 681,558.27
  5. Step 5: Solve for x
    x = 681,558.27/725.88
  6. Step 6: Final answer
    x = 938.94

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.