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Finding the Fourth Proportional to 321.01, 481.27 and 112.72

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Solution

The fourth proportional to 321.01, 481.27 and 112.72 is: 168.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.01 : 481.27 = 112.72 : x
  2. Step 2: Convert to fraction form
    321.01/481.27 = 112.72/x
  3. Step 3: Cross multiply
    321.01x = 481.27 × 112.72
  4. Step 4: Simplify right side
    321.01x = 54,246.35
  5. Step 5: Solve for x
    x = 54,246.35/321.01
  6. Step 6: Final answer
    x = 168.99

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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.