Home / 2,987.94-4,481.21-1,231.20

Finding the Fourth Proportional to 2,987.94, 4,481.21 and 1,231.20

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Solution

The fourth proportional to 2,987.94, 4,481.21 and 1,231.20 is: 1,846.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.94 : 4,481.21 = 1,231.20 : x
  2. Step 2: Convert to fraction form
    2,987.94/4,481.21 = 1,231.20/x
  3. Step 3: Cross multiply
    2,987.94x = 4,481.21 × 1,231.20
  4. Step 4: Simplify right side
    2,987.94x = 5,517,268.83
  5. Step 5: Solve for x
    x = 5,517,268.83/2,987.94
  6. Step 6: Final answer
    x = 1,846.51

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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.