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Finding the Fourth Proportional to 269.53, 372.20 and 228.42

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Solution

The fourth proportional to 269.53, 372.20 and 228.42 is: 315.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    269.53 : 372.20 = 228.42 : x
  2. Step 2: Convert to fraction form
    269.53/372.20 = 228.42/x
  3. Step 3: Cross multiply
    269.53x = 372.20 × 228.42
  4. Step 4: Simplify right side
    269.53x = 85,016.78
  5. Step 5: Solve for x
    x = 85,016.78/269.53
  6. Step 6: Final answer
    x = 315.43

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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.