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Finding the Fourth Proportional to 267.71, 401.56 and 105.39

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Solution

The fourth proportional to 267.71, 401.56 and 105.39 is: 158.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    267.71 : 401.56 = 105.39 : x
  2. Step 2: Convert to fraction form
    267.71/401.56 = 105.39/x
  3. Step 3: Cross multiply
    267.71x = 401.56 × 105.39
  4. Step 4: Simplify right side
    267.71x = 42,320.41
  5. Step 5: Solve for x
    x = 42,320.41/267.71
  6. Step 6: Final answer
    x = 158.09

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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.