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Finding the Fourth Proportional to 725.92, 1,001.72 and 411.18

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Solution

The fourth proportional to 725.92, 1,001.72 and 411.18 is: 567.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    725.92 : 1,001.72 = 411.18 : x
  2. Step 2: Convert to fraction form
    725.92/1,001.72 = 411.18/x
  3. Step 3: Cross multiply
    725.92x = 1,001.72 × 411.18
  4. Step 4: Simplify right side
    725.92x = 411,887.23
  5. Step 5: Solve for x
    x = 411,887.23/725.92
  6. Step 6: Final answer
    x = 567.40

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Half scale
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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.