Home / 2,821.80-4,229.82-1,998.12

Finding the Fourth Proportional to 2,821.80, 4,229.82 and 1,998.12

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Solution

The fourth proportional to 2,821.80, 4,229.82 and 1,998.12 is: 2,995.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,821.80 : 4,229.82 = 1,998.12 : x
  2. Step 2: Convert to fraction form
    2,821.80/4,229.82 = 1,998.12/x
  3. Step 3: Cross multiply
    2,821.80x = 4,229.82 × 1,998.12
  4. Step 4: Simplify right side
    2,821.80x = 8,451,687.94
  5. Step 5: Solve for x
    x = 8,451,687.94/2,821.80
  6. Step 6: Final answer
    x = 2,995.14

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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.