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Finding the Fourth Proportional to 462.92, 638.96 and 276.45

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Solution

The fourth proportional to 462.92, 638.96 and 276.45 is: 381.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    462.92 : 638.96 = 276.45 : x
  2. Step 2: Convert to fraction form
    462.92/638.96 = 276.45/x
  3. Step 3: Cross multiply
    462.92x = 638.96 × 276.45
  4. Step 4: Simplify right side
    462.92x = 176,640.49
  5. Step 5: Solve for x
    x = 176,640.49/462.92
  6. Step 6: Final answer
    x = 381.58

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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.