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Finding the Fourth Proportional to 1,641.46, 2,462.18 and 408.87

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Solution

The fourth proportional to 1,641.46, 2,462.18 and 408.87 is: 613.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,641.46 : 2,462.18 = 408.87 : x
  2. Step 2: Convert to fraction form
    1,641.46/2,462.18 = 408.87/x
  3. Step 3: Cross multiply
    1,641.46x = 2,462.18 × 408.87
  4. Step 4: Simplify right side
    1,641.46x = 1,006,711.54
  5. Step 5: Solve for x
    x = 1,006,711.54/1,641.46
  6. Step 6: Final answer
    x = 613.30

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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.