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Finding the Fourth Proportional to 269.43, 372.15 and 220.89

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Solution

The fourth proportional to 269.43, 372.15 and 220.89 is: 305.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    269.43 : 372.15 = 220.89 : x
  2. Step 2: Convert to fraction form
    269.43/372.15 = 220.89/x
  3. Step 3: Cross multiply
    269.43x = 372.15 × 220.89
  4. Step 4: Simplify right side
    269.43x = 82,204.21
  5. Step 5: Solve for x
    x = 82,204.21/269.43
  6. Step 6: Final answer
    x = 305.10

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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.