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Finding the Fourth Proportional to 438.85, 658.28 and 130.73

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Solution

The fourth proportional to 438.85, 658.28 and 130.73 is: 196.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.85 : 658.28 = 130.73 : x
  2. Step 2: Convert to fraction form
    438.85/658.28 = 130.73/x
  3. Step 3: Cross multiply
    438.85x = 658.28 × 130.73
  4. Step 4: Simplify right side
    438.85x = 86,053.98
  5. Step 5: Solve for x
    x = 86,053.98/438.85
  6. Step 6: Final answer
    x = 196.09

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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.