Home / 3,121.20-4,680.22-1,040.46

Finding the Fourth Proportional to 3,121.20, 4,680.22 and 1,040.46

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Solution

The fourth proportional to 3,121.20, 4,680.22 and 1,040.46 is: 1,560.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.20 : 4,680.22 = 1,040.46 : x
  2. Step 2: Convert to fraction form
    3,121.20/4,680.22 = 1,040.46/x
  3. Step 3: Cross multiply
    3,121.20x = 4,680.22 × 1,040.46
  4. Step 4: Simplify right side
    3,121.20x = 4,869,581.70
  5. Step 5: Solve for x
    x = 4,869,581.70/3,121.20
  6. Step 6: Final answer
    x = 1,560.16

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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.