Home / 2,080.80-3,121.20-926.55

Finding the Fourth Proportional to 2,080.80, 3,121.20 and 926.55

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Solution

The fourth proportional to 2,080.80, 3,121.20 and 926.55 is: 1,389.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,080.80 : 3,121.20 = 926.55 : x
  2. Step 2: Convert to fraction form
    2,080.80/3,121.20 = 926.55/x
  3. Step 3: Cross multiply
    2,080.80x = 3,121.20 × 926.55
  4. Step 4: Simplify right side
    2,080.80x = 2,891,947.86
  5. Step 5: Solve for x
    x = 2,891,947.86/2,080.80
  6. Step 6: Final answer
    x = 1,389.83

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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.