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Finding the Fourth Proportional to 240.43, 331.44 and 198.91

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Solution

The fourth proportional to 240.43, 331.44 and 198.91 is: 274.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    240.43 : 331.44 = 198.91 : x
  2. Step 2: Convert to fraction form
    240.43/331.44 = 198.91/x
  3. Step 3: Cross multiply
    240.43x = 331.44 × 198.91
  4. Step 4: Simplify right side
    240.43x = 65,926.73
  5. Step 5: Solve for x
    x = 65,926.73/240.43
  6. Step 6: Final answer
    x = 274.20

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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.