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Finding the Fourth Proportional to 3,906.60, 5,391.60 and 2,227.92

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Solution

The fourth proportional to 3,906.60, 5,391.60 and 2,227.92 is: 3,074.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,906.60 : 5,391.60 = 2,227.92 : x
  2. Step 2: Convert to fraction form
    3,906.60/5,391.60 = 2,227.92/x
  3. Step 3: Cross multiply
    3,906.60x = 5,391.60 × 2,227.92
  4. Step 4: Simplify right side
    3,906.60x = 12,012,053.47
  5. Step 5: Solve for x
    x = 12,012,053.47/3,906.60
  6. Step 6: Final answer
    x = 3,074.81

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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.