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Finding the Fourth Proportional to 329.72, 494.68 and 98.61

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Solution

The fourth proportional to 329.72, 494.68 and 98.61 is: 147.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    329.72 : 494.68 = 98.61 : x
  2. Step 2: Convert to fraction form
    329.72/494.68 = 98.61/x
  3. Step 3: Cross multiply
    329.72x = 494.68 × 98.61
  4. Step 4: Simplify right side
    329.72x = 48,780.39
  5. Step 5: Solve for x
    x = 48,780.39/329.72
  6. Step 6: Final answer
    x = 147.95

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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.