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Finding the Fourth Proportional to 231.97, 348.02 and 103.81

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Solution

The fourth proportional to 231.97, 348.02 and 103.81 is: 155.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.97 : 348.02 = 103.81 : x
  2. Step 2: Convert to fraction form
    231.97/348.02 = 103.81/x
  3. Step 3: Cross multiply
    231.97x = 348.02 × 103.81
  4. Step 4: Simplify right side
    231.97x = 36,127.96
  5. Step 5: Solve for x
    x = 36,127.96/231.97
  6. Step 6: Final answer
    x = 155.74

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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.