Home / 3,080.40-4,620.60-1,231.80

Finding the Fourth Proportional to 3,080.40, 4,620.60 and 1,231.80

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Solution

The fourth proportional to 3,080.40, 4,620.60 and 1,231.80 is: 1,847.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,080.40 : 4,620.60 = 1,231.80 : x
  2. Step 2: Convert to fraction form
    3,080.40/4,620.60 = 1,231.80/x
  3. Step 3: Cross multiply
    3,080.40x = 4,620.60 × 1,231.80
  4. Step 4: Simplify right side
    3,080.40x = 5,691,655.08
  5. Step 5: Solve for x
    x = 5,691,655.08/3,080.40
  6. Step 6: Final answer
    x = 1,847.70

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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.