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Finding the Fourth Proportional to 240.90, 361.27 and 103.81

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Solution

The fourth proportional to 240.90, 361.27 and 103.81 is: 155.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    240.90 : 361.27 = 103.81 : x
  2. Step 2: Convert to fraction form
    240.90/361.27 = 103.81/x
  3. Step 3: Cross multiply
    240.90x = 361.27 × 103.81
  4. Step 4: Simplify right side
    240.90x = 37,503.44
  5. Step 5: Solve for x
    x = 37,503.44/240.90
  6. Step 6: Final answer
    x = 155.68

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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.