Home / 3,081.10-4,619.40-1,231.30

Finding the Fourth Proportional to 3,081.10, 4,619.40 and 1,231.30

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Solution

The fourth proportional to 3,081.10, 4,619.40 and 1,231.30 is: 1,846.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,081.10 : 4,619.40 = 1,231.30 : x
  2. Step 2: Convert to fraction form
    3,081.10/4,619.40 = 1,231.30/x
  3. Step 3: Cross multiply
    3,081.10x = 4,619.40 × 1,231.30
  4. Step 4: Simplify right side
    3,081.10x = 5,687,867.22
  5. Step 5: Solve for x
    x = 5,687,867.22/3,081.10
  6. Step 6: Final answer
    x = 1,846.05

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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.