Home / 2,639.25-3,959.62-1,080.38

Finding the Fourth Proportional to 2,639.25, 3,959.62 and 1,080.38

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Solution

The fourth proportional to 2,639.25, 3,959.62 and 1,080.38 is: 1,620.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,639.25 : 3,959.62 = 1,080.38 : x
  2. Step 2: Convert to fraction form
    2,639.25/3,959.62 = 1,080.38/x
  3. Step 3: Cross multiply
    2,639.25x = 3,959.62 × 1,080.38
  4. Step 4: Simplify right side
    2,639.25x = 4,277,869.06
  5. Step 5: Solve for x
    x = 4,277,869.06/2,639.25
  6. Step 6: Final answer
    x = 1,620.87

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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.