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Finding the Fourth Proportional to 892.46, 1,339.09 and 481.12

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Solution

The fourth proportional to 892.46, 1,339.09 and 481.12 is: 721.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    892.46 : 1,339.09 = 481.12 : x
  2. Step 2: Convert to fraction form
    892.46/1,339.09 = 481.12/x
  3. Step 3: Cross multiply
    892.46x = 1,339.09 × 481.12
  4. Step 4: Simplify right side
    892.46x = 644,258.43
  5. Step 5: Solve for x
    x = 644,258.43/892.46
  6. Step 6: Final answer
    x = 721.89

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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.