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Finding the Fourth Proportional to 240.68, 331.62 and 218.90

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Solution

The fourth proportional to 240.68, 331.62 and 218.90 is: 301.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    240.68 : 331.62 = 218.90 : x
  2. Step 2: Convert to fraction form
    240.68/331.62 = 218.90/x
  3. Step 3: Cross multiply
    240.68x = 331.62 × 218.90
  4. Step 4: Simplify right side
    240.68x = 72,591.62
  5. Step 5: Solve for x
    x = 72,591.62/240.68
  6. Step 6: Final answer
    x = 301.61

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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.