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Finding the Fourth Proportional to 462.73, 638.69 and 287.97

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Solution

The fourth proportional to 462.73, 638.69 and 287.97 is: 397.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    462.73 : 638.69 = 287.97 : x
  2. Step 2: Convert to fraction form
    462.73/638.69 = 287.97/x
  3. Step 3: Cross multiply
    462.73x = 638.69 × 287.97
  4. Step 4: Simplify right side
    462.73x = 183,923.56
  5. Step 5: Solve for x
    x = 183,923.56/462.73
  6. Step 6: Final answer
    x = 397.47

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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.