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Finding the Fourth Proportional to 231.77, 319.12 and 196.73

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Solution

The fourth proportional to 231.77, 319.12 and 196.73 is: 270.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.77 : 319.12 = 196.73 : x
  2. Step 2: Convert to fraction form
    231.77/319.12 = 196.73/x
  3. Step 3: Cross multiply
    231.77x = 319.12 × 196.73
  4. Step 4: Simplify right side
    231.77x = 62,779.59
  5. Step 5: Solve for x
    x = 62,779.59/231.77
  6. Step 6: Final answer
    x = 270.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.