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Finding the Fourth Proportional to 231.73, 319.77 and 138.46

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Solution

The fourth proportional to 231.73, 319.77 and 138.46 is: 191.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.73 : 319.77 = 138.46 : x
  2. Step 2: Convert to fraction form
    231.73/319.77 = 138.46/x
  3. Step 3: Cross multiply
    231.73x = 319.77 × 138.46
  4. Step 4: Simplify right side
    231.73x = 44,275.35
  5. Step 5: Solve for x
    x = 44,275.35/231.73
  6. Step 6: Final answer
    x = 191.06

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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.