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Finding the Fourth Proportional to 462.38, 638.09 and 255.38

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Solution

The fourth proportional to 462.38, 638.09 and 255.38 is: 352.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    462.38 : 638.09 = 255.38 : x
  2. Step 2: Convert to fraction form
    462.38/638.09 = 255.38/x
  3. Step 3: Cross multiply
    462.38x = 638.09 × 255.38
  4. Step 4: Simplify right side
    462.38x = 162,950.96
  5. Step 5: Solve for x
    x = 162,950.96/462.38
  6. Step 6: Final answer
    x = 352.42

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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.