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Finding the Fourth Proportional to 4,168.40, 6,245.40 and 3,909.20

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Solution

The fourth proportional to 4,168.40, 6,245.40 and 3,909.20 is: 5,857.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,168.40 : 6,245.40 = 3,909.20 : x
  2. Step 2: Convert to fraction form
    4,168.40/6,245.40 = 3,909.20/x
  3. Step 3: Cross multiply
    4,168.40x = 6,245.40 × 3,909.20
  4. Step 4: Simplify right side
    4,168.40x = 24,414,517.68
  5. Step 5: Solve for x
    x = 24,414,517.68/4,168.40
  6. Step 6: Final answer
    x = 5,857.05

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1.5x scale

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.