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Finding the Fourth Proportional to 3,778.68, 5,213.98 and 2,099.92

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Solution

The fourth proportional to 3,778.68, 5,213.98 and 2,099.92 is: 2,897.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,778.68 : 5,213.98 = 2,099.92 : x
  2. Step 2: Convert to fraction form
    3,778.68/5,213.98 = 2,099.92/x
  3. Step 3: Cross multiply
    3,778.68x = 5,213.98 × 2,099.92
  4. Step 4: Simplify right side
    3,778.68x = 10,948,940.88
  5. Step 5: Solve for x
    x = 10,948,940.88/3,778.68
  6. Step 6: Final answer
    x = 2,897.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.