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Finding the Fourth Proportional to 269.83, 372.87 and 220.69

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Solution

The fourth proportional to 269.83, 372.87 and 220.69 is: 304.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    269.83 : 372.87 = 220.69 : x
  2. Step 2: Convert to fraction form
    269.83/372.87 = 220.69/x
  3. Step 3: Cross multiply
    269.83x = 372.87 × 220.69
  4. Step 4: Simplify right side
    269.83x = 82,288.68
  5. Step 5: Solve for x
    x = 82,288.68/269.83
  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.