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Finding the Fourth Proportional to 881.80, 1,321.98 and 449.48

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Solution

The fourth proportional to 881.80, 1,321.98 and 449.48 is: 673.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.80 : 1,321.98 = 449.48 : x
  2. Step 2: Convert to fraction form
    881.80/1,321.98 = 449.48/x
  3. Step 3: Cross multiply
    881.80x = 1,321.98 × 449.48
  4. Step 4: Simplify right side
    881.80x = 594,203.57
  5. Step 5: Solve for x
    x = 594,203.57/881.80
  6. Step 6: Final answer
    x = 673.85

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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.