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Finding the Fourth Proportional to 439.10, 658.76 and 130.95

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Solution

The fourth proportional to 439.10, 658.76 and 130.95 is: 196.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.10 : 658.76 = 130.95 : x
  2. Step 2: Convert to fraction form
    439.10/658.76 = 130.95/x
  3. Step 3: Cross multiply
    439.10x = 658.76 × 130.95
  4. Step 4: Simplify right side
    439.10x = 86,263.97
  5. Step 5: Solve for x
    x = 86,263.97/439.10
  6. Step 6: Final answer
    x = 196.46

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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.