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Finding the Fourth Proportional to 462.67, 638.38 and 276.23

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Solution

The fourth proportional to 462.67, 638.38 and 276.23 is: 381.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    462.67 : 638.38 = 276.23 : x
  2. Step 2: Convert to fraction form
    462.67/638.38 = 276.23/x
  3. Step 3: Cross multiply
    462.67x = 638.38 × 276.23
  4. Step 4: Simplify right side
    462.67x = 176,340.61
  5. Step 5: Solve for x
    x = 176,340.61/462.67
  6. Step 6: Final answer
    x = 381.14

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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.