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Finding the Fourth Proportional to 724.21, 999.44 and 458.56

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Solution

The fourth proportional to 724.21, 999.44 and 458.56 is: 632.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    724.21 : 999.44 = 458.56 : x
  2. Step 2: Convert to fraction form
    724.21/999.44 = 458.56/x
  3. Step 3: Cross multiply
    724.21x = 999.44 × 458.56
  4. Step 4: Simplify right side
    724.21x = 458,295.92
  5. Step 5: Solve for x
    x = 458,295.92/724.21
  6. Step 6: Final answer
    x = 632.82

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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.