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Finding the Fourth Proportional to 267.06, 398.94 and 198.21

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Solution

The fourth proportional to 267.06, 398.94 and 198.21 is: 296.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    267.06 : 398.94 = 198.21 : x
  2. Step 2: Convert to fraction form
    267.06/398.94 = 198.21/x
  3. Step 3: Cross multiply
    267.06x = 398.94 × 198.21
  4. Step 4: Simplify right side
    267.06x = 79,073.90
  5. Step 5: Solve for x
    x = 79,073.90/267.06
  6. Step 6: Final answer
    x = 296.09

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.