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Finding the Fourth Proportional to 1,382.44, 2,073.96 and 408.46

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Solution

The fourth proportional to 1,382.44, 2,073.96 and 408.46 is: 612.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,382.44 : 2,073.96 = 408.46 : x
  2. Step 2: Convert to fraction form
    1,382.44/2,073.96 = 408.46/x
  3. Step 3: Cross multiply
    1,382.44x = 2,073.96 × 408.46
  4. Step 4: Simplify right side
    1,382.44x = 847,129.70
  5. Step 5: Solve for x
    x = 847,129.70/1,382.44
  6. Step 6: Final answer
    x = 612.78

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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.