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Finding the Fourth Proportional to 725.82, 1,001.76 and 411.12

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Solution

The fourth proportional to 725.82, 1,001.76 and 411.12 is: 567.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    725.82 : 1,001.76 = 411.12 : x
  2. Step 2: Convert to fraction form
    725.82/1,001.76 = 411.12/x
  3. Step 3: Cross multiply
    725.82x = 1,001.76 × 411.12
  4. Step 4: Simplify right side
    725.82x = 411,843.57
  5. Step 5: Solve for x
    x = 411,843.57/725.82
  6. Step 6: Final answer
    x = 567.42

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.