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Finding the Fourth Proportional to 724.35, 999.40 and 462.15

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Solution

The fourth proportional to 724.35, 999.40 and 462.15 is: 637.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    724.35 : 999.40 = 462.15 : x
  2. Step 2: Convert to fraction form
    724.35/999.40 = 462.15/x
  3. Step 3: Cross multiply
    724.35x = 999.40 × 462.15
  4. Step 4: Simplify right side
    724.35x = 461,872.71
  5. Step 5: Solve for x
    x = 461,872.71/724.35
  6. Step 6: Final answer
    x = 637.64

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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.