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Finding the Fourth Proportional to 484.18, 724.90 and 445.91

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Solution

The fourth proportional to 484.18, 724.90 and 445.91 is: 667.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.18 : 724.90 = 445.91 : x
  2. Step 2: Convert to fraction form
    484.18/724.90 = 445.91/x
  3. Step 3: Cross multiply
    484.18x = 724.90 × 445.91
  4. Step 4: Simplify right side
    484.18x = 323,236.26
  5. Step 5: Solve for x
    x = 323,236.26/484.18
  6. Step 6: Final answer
    x = 667.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.