Home / 3,081.87-4,253.31-1,902.78

Finding the Fourth Proportional to 3,081.87, 4,253.31 and 1,902.78

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Solution

The fourth proportional to 3,081.87, 4,253.31 and 1,902.78 is: 2,626.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,081.87 : 4,253.31 = 1,902.78 : x
  2. Step 2: Convert to fraction form
    3,081.87/4,253.31 = 1,902.78/x
  3. Step 3: Cross multiply
    3,081.87x = 4,253.31 × 1,902.78
  4. Step 4: Simplify right side
    3,081.87x = 8,093,113.20
  5. Step 5: Solve for x
    x = 8,093,113.20/3,081.87
  6. Step 6: Final answer
    x = 2,626.04

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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.