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Finding the Fourth Proportional to 240.82, 361.42 and 138.20

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Solution

The fourth proportional to 240.82, 361.42 and 138.20 is: 207.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    240.82 : 361.42 = 138.20 : x
  2. Step 2: Convert to fraction form
    240.82/361.42 = 138.20/x
  3. Step 3: Cross multiply
    240.82x = 361.42 × 138.20
  4. Step 4: Simplify right side
    240.82x = 49,948.24
  5. Step 5: Solve for x
    x = 49,948.24/240.82
  6. Step 6: Final answer
    x = 207.41

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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.