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Finding the Fourth Proportional to 231.93, 321.45 and 227.61

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Solution

The fourth proportional to 231.93, 321.45 and 227.61 is: 315.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.93 : 321.45 = 227.61 : x
  2. Step 2: Convert to fraction form
    231.93/321.45 = 227.61/x
  3. Step 3: Cross multiply
    231.93x = 321.45 × 227.61
  4. Step 4: Simplify right side
    231.93x = 73,165.23
  5. Step 5: Solve for x
    x = 73,165.23/231.93
  6. Step 6: Final answer
    x = 315.46

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.