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Finding the Fourth Proportional to 725.64, 1,001.15 and 410.88

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Solution

The fourth proportional to 725.64, 1,001.15 and 410.88 is: 566.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    725.64 : 1,001.15 = 410.88 : x
  2. Step 2: Convert to fraction form
    725.64/1,001.15 = 410.88/x
  3. Step 3: Cross multiply
    725.64x = 1,001.15 × 410.88
  4. Step 4: Simplify right side
    725.64x = 411,345.45
  5. Step 5: Solve for x
    x = 411,345.45/725.64
  6. Step 6: Final answer
    x = 566.87

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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.