Home / 2,639.75-3,960.37-1,080.87

Finding the Fourth Proportional to 2,639.75, 3,960.37 and 1,080.87

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Solution

The fourth proportional to 2,639.75, 3,960.37 and 1,080.87 is: 1,621.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,639.75 : 3,960.37 = 1,080.87 : x
  2. Step 2: Convert to fraction form
    2,639.75/3,960.37 = 1,080.87/x
  3. Step 3: Cross multiply
    2,639.75x = 3,960.37 × 1,080.87
  4. Step 4: Simplify right side
    2,639.75x = 4,280,645.12
  5. Step 5: Solve for x
    x = 4,280,645.12/2,639.75
  6. Step 6: Final answer
    x = 1,621.61

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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.