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Finding the Fourth Proportional to 439.43, 658.12 and 348.19

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Solution

The fourth proportional to 439.43, 658.12 and 348.19 is: 521.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.43 : 658.12 = 348.19 : x
  2. Step 2: Convert to fraction form
    439.43/658.12 = 348.19/x
  3. Step 3: Cross multiply
    439.43x = 658.12 × 348.19
  4. Step 4: Simplify right side
    439.43x = 229,149.81
  5. Step 5: Solve for x
    x = 229,149.81/439.43
  6. Step 6: Final answer
    x = 521.47

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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.