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Finding the Fourth Proportional to 401.27, 553.94 and 254.10

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Solution

The fourth proportional to 401.27, 553.94 and 254.10 is: 350.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.27 : 553.94 = 254.10 : x
  2. Step 2: Convert to fraction form
    401.27/553.94 = 254.10/x
  3. Step 3: Cross multiply
    401.27x = 553.94 × 254.10
  4. Step 4: Simplify right side
    401.27x = 140,757.91
  5. Step 5: Solve for x
    x = 140,757.91/401.27
  6. Step 6: Final answer
    x = 350.78

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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.