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Finding the Fourth Proportional to 231.24, 319.13 and 127.74

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Solution

The fourth proportional to 231.24, 319.13 and 127.74 is: 176.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.24 : 319.13 = 127.74 : x
  2. Step 2: Convert to fraction form
    231.24/319.13 = 127.74/x
  3. Step 3: Cross multiply
    231.24x = 319.13 × 127.74
  4. Step 4: Simplify right side
    231.24x = 40,765.03
  5. Step 5: Solve for x
    x = 40,765.03/231.24
  6. Step 6: Final answer
    x = 176.29

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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.