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Finding the Fourth Proportional to 231.41, 347.17 and 69.11

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Solution

The fourth proportional to 231.41, 347.17 and 69.11 is: 103.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.41 : 347.17 = 69.11 : x
  2. Step 2: Convert to fraction form
    231.41/347.17 = 69.11/x
  3. Step 3: Cross multiply
    231.41x = 347.17 × 69.11
  4. Step 4: Simplify right side
    231.41x = 23,992.92
  5. Step 5: Solve for x
    x = 23,992.92/231.41
  6. Step 6: Final answer
    x = 103.68

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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.