Home / 2,689.20-4,028.13-1,229.58

Finding the Fourth Proportional to 2,689.20, 4,028.13 and 1,229.58

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Solution

The fourth proportional to 2,689.20, 4,028.13 and 1,229.58 is: 1,841.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,689.20 : 4,028.13 = 1,229.58 : x
  2. Step 2: Convert to fraction form
    2,689.20/4,028.13 = 1,229.58/x
  3. Step 3: Cross multiply
    2,689.20x = 4,028.13 × 1,229.58
  4. Step 4: Simplify right side
    2,689.20x = 4,952,908.09
  5. Step 5: Solve for x
    x = 4,952,908.09/2,689.20
  6. Step 6: Final answer
    x = 1,841.78

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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.