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Finding the Fourth Proportional to 3,998.87, 5,517.62 and 3,055.73

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Solution

The fourth proportional to 3,998.87, 5,517.62 and 3,055.73 is: 4,216.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,998.87 : 5,517.62 = 3,055.73 : x
  2. Step 2: Convert to fraction form
    3,998.87/5,517.62 = 3,055.73/x
  3. Step 3: Cross multiply
    3,998.87x = 5,517.62 × 3,055.73
  4. Step 4: Simplify right side
    3,998.87x = 16,860,325.55
  5. Step 5: Solve for x
    x = 16,860,325.55/3,998.87
  6. Step 6: Final answer
    x = 4,216.27

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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.