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Finding the Fourth Proportional to 724.58, 1,000.40 and 459.11

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Solution

The fourth proportional to 724.58, 1,000.40 and 459.11 is: 633.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    724.58 : 1,000.40 = 459.11 : x
  2. Step 2: Convert to fraction form
    724.58/1,000.40 = 459.11/x
  3. Step 3: Cross multiply
    724.58x = 1,000.40 × 459.11
  4. Step 4: Simplify right side
    724.58x = 459,286.35
  5. Step 5: Solve for x
    x = 459,286.35/724.58
  6. Step 6: Final answer
    x = 633.87

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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.