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Finding the Fourth Proportional to 439.70, 658.53 and 348.17

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Solution

The fourth proportional to 439.70, 658.53 and 348.17 is: 521.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.70 : 658.53 = 348.17 : x
  2. Step 2: Convert to fraction form
    439.70/658.53 = 348.17/x
  3. Step 3: Cross multiply
    439.70x = 658.53 × 348.17
  4. Step 4: Simplify right side
    439.70x = 229,277.10
  5. Step 5: Solve for x
    x = 229,277.10/439.70
  6. Step 6: Final answer
    x = 521.45

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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.