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Finding the Fourth Proportional to 456.73, 630.40 and 281.97

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Solution

The fourth proportional to 456.73, 630.40 and 281.97 is: 389.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.73 : 630.40 = 281.97 : x
  2. Step 2: Convert to fraction form
    456.73/630.40 = 281.97/x
  3. Step 3: Cross multiply
    456.73x = 630.40 × 281.97
  4. Step 4: Simplify right side
    456.73x = 177,753.45
  5. Step 5: Solve for x
    x = 177,753.45/456.73
  6. Step 6: Final answer
    x = 389.19

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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.