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Finding the Fourth Proportional to 724.14, 998.91 and 475.47

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Solution

The fourth proportional to 724.14, 998.91 and 475.47 is: 655.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    724.14 : 998.91 = 475.47 : x
  2. Step 2: Convert to fraction form
    724.14/998.91 = 475.47/x
  3. Step 3: Cross multiply
    724.14x = 998.91 × 475.47
  4. Step 4: Simplify right side
    724.14x = 474,951.74
  5. Step 5: Solve for x
    x = 474,951.74/724.14
  6. Step 6: Final answer
    x = 655.88

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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.