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Finding the Fourth Proportional to 267.18, 400.78 and 194.28

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Solution

The fourth proportional to 267.18, 400.78 and 194.28 is: 291.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    267.18 : 400.78 = 194.28 : x
  2. Step 2: Convert to fraction form
    267.18/400.78 = 194.28/x
  3. Step 3: Cross multiply
    267.18x = 400.78 × 194.28
  4. Step 4: Simplify right side
    267.18x = 77,863.54
  5. Step 5: Solve for x
    x = 77,863.54/267.18
  6. Step 6: Final answer
    x = 291.43

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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.