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Finding the Fourth Proportional to 462.71, 638.66 and 276.14

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Solution

The fourth proportional to 462.71, 638.66 and 276.14 is: 381.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    462.71 : 638.66 = 276.14 : x
  2. Step 2: Convert to fraction form
    462.71/638.66 = 276.14/x
  3. Step 3: Cross multiply
    462.71x = 638.66 × 276.14
  4. Step 4: Simplify right side
    462.71x = 176,357.07
  5. Step 5: Solve for x
    x = 176,357.07/462.71
  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.