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Finding the Fourth Proportional to 439.82, 658.35 and 324.39

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Solution

The fourth proportional to 439.82, 658.35 and 324.39 is: 485.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.82 : 658.35 = 324.39 : x
  2. Step 2: Convert to fraction form
    439.82/658.35 = 324.39/x
  3. Step 3: Cross multiply
    439.82x = 658.35 × 324.39
  4. Step 4: Simplify right side
    439.82x = 213,562.16
  5. Step 5: Solve for x
    x = 213,562.16/439.82
  6. Step 6: Final answer
    x = 485.57

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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.