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Finding the Fourth Proportional to 240.25, 331.14 and 198.67

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Solution

The fourth proportional to 240.25, 331.14 and 198.67 is: 273.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    240.25 : 331.14 = 198.67 : x
  2. Step 2: Convert to fraction form
    240.25/331.14 = 198.67/x
  3. Step 3: Cross multiply
    240.25x = 331.14 × 198.67
  4. Step 4: Simplify right side
    240.25x = 65,787.58
  5. Step 5: Solve for x
    x = 65,787.58/240.25
  6. Step 6: Final answer
    x = 273.83

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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.