Home / 2,987.20-4,478.97-1,231.66

Finding the Fourth Proportional to 2,987.20, 4,478.97 and 1,231.66

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Solution

The fourth proportional to 2,987.20, 4,478.97 and 1,231.66 is: 1,846.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.20 : 4,478.97 = 1,231.66 : x
  2. Step 2: Convert to fraction form
    2,987.20/4,478.97 = 1,231.66/x
  3. Step 3: Cross multiply
    2,987.20x = 4,478.97 × 1,231.66
  4. Step 4: Simplify right side
    2,987.20x = 5,516,568.19
  5. Step 5: Solve for x
    x = 5,516,568.19/2,987.20
  6. Step 6: Final answer
    x = 1,846.74

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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.