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Finding the Fourth Proportional to 269.61, 404.15 and 147.84

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Solution

The fourth proportional to 269.61, 404.15 and 147.84 is: 221.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    269.61 : 404.15 = 147.84 : x
  2. Step 2: Convert to fraction form
    269.61/404.15 = 147.84/x
  3. Step 3: Cross multiply
    269.61x = 404.15 × 147.84
  4. Step 4: Simplify right side
    269.61x = 59,748.80
  5. Step 5: Solve for x
    x = 59,748.80/269.61
  6. Step 6: Final answer
    x = 221.61

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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.