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Finding the Fourth Proportional to 240.84, 361.31 and 103.86

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Solution

The fourth proportional to 240.84, 361.31 and 103.86 is: 155.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    240.84 : 361.31 = 103.86 : x
  2. Step 2: Convert to fraction form
    240.84/361.31 = 103.86/x
  3. Step 3: Cross multiply
    240.84x = 361.31 × 103.86
  4. Step 4: Simplify right side
    240.84x = 37,525.14
  5. Step 5: Solve for x
    x = 37,525.14/240.84
  6. Step 6: Final answer
    x = 155.81

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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.