Home / 3,278.20-4,919.10-1,331.80

Finding the Fourth Proportional to 3,278.20, 4,919.10 and 1,331.80

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Solution

The fourth proportional to 3,278.20, 4,919.10 and 1,331.80 is: 1,998.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,278.20 : 4,919.10 = 1,331.80 : x
  2. Step 2: Convert to fraction form
    3,278.20/4,919.10 = 1,331.80/x
  3. Step 3: Cross multiply
    3,278.20x = 4,919.10 × 1,331.80
  4. Step 4: Simplify right side
    3,278.20x = 6,551,257.38
  5. Step 5: Solve for x
    x = 6,551,257.38/3,278.20
  6. Step 6: Final answer
    x = 1,998.43

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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.