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Finding the Fourth Proportional to 414.28, 619.56 and 267.76

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Solution

The fourth proportional to 414.28, 619.56 and 267.76 is: 400.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    414.28 : 619.56 = 267.76 : x
  2. Step 2: Convert to fraction form
    414.28/619.56 = 267.76/x
  3. Step 3: Cross multiply
    414.28x = 619.56 × 267.76
  4. Step 4: Simplify right side
    414.28x = 165,893.39
  5. Step 5: Solve for x
    x = 165,893.39/414.28
  6. Step 6: Final answer
    x = 400.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.