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Finding the Fourth Proportional to 3,906.87, 5,391.62 and 2,228.55

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Solution

The fourth proportional to 3,906.87, 5,391.62 and 2,228.55 is: 3,075.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,906.87 : 5,391.62 = 2,228.55 : x
  2. Step 2: Convert to fraction form
    3,906.87/5,391.62 = 2,228.55/x
  3. Step 3: Cross multiply
    3,906.87x = 5,391.62 × 2,228.55
  4. Step 4: Simplify right side
    3,906.87x = 12,015,473.36
  5. Step 5: Solve for x
    x = 12,015,473.36/3,906.87
  6. Step 6: Final answer
    x = 3,075.48

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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.