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Finding the Fourth Proportional to 269.78, 372.57 and 220.82

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Solution

The fourth proportional to 269.78, 372.57 and 220.82 is: 304.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    269.78 : 372.57 = 220.82 : x
  2. Step 2: Convert to fraction form
    269.78/372.57 = 220.82/x
  3. Step 3: Cross multiply
    269.78x = 372.57 × 220.82
  4. Step 4: Simplify right side
    269.78x = 82,270.91
  5. Step 5: Solve for x
    x = 82,270.91/269.78
  6. Step 6: Final answer
    x = 304.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.