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Finding the Fourth Proportional to 725.76, 1,001.46 and 431.28

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Solution

The fourth proportional to 725.76, 1,001.46 and 431.28 is: 595.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    725.76 : 1,001.46 = 431.28 : x
  2. Step 2: Convert to fraction form
    725.76/1,001.46 = 431.28/x
  3. Step 3: Cross multiply
    725.76x = 1,001.46 × 431.28
  4. Step 4: Simplify right side
    725.76x = 431,909.67
  5. Step 5: Solve for x
    x = 431,909.67/725.76
  6. Step 6: Final answer
    x = 595.11

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