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Finding the Fourth Proportional to 725.95, 1,001.12 and 559.90

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Solution

The fourth proportional to 725.95, 1,001.12 and 559.90 is: 772.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    725.95 : 1,001.12 = 559.90 : x
  2. Step 2: Convert to fraction form
    725.95/1,001.12 = 559.90/x
  3. Step 3: Cross multiply
    725.95x = 1,001.12 × 559.90
  4. Step 4: Simplify right side
    725.95x = 560,519.28
  5. Step 5: Solve for x
    x = 560,519.28/725.95
  6. Step 6: Final answer
    x = 772.12

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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.