Home / 2,639.88-3,957.21-1,250.78

Finding the Fourth Proportional to 2,639.88, 3,957.21 and 1,250.78

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Solution

The fourth proportional to 2,639.88, 3,957.21 and 1,250.78 is: 1,874.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,639.88 : 3,957.21 = 1,250.78 : x
  2. Step 2: Convert to fraction form
    2,639.88/3,957.21 = 1,250.78/x
  3. Step 3: Cross multiply
    2,639.88x = 3,957.21 × 1,250.78
  4. Step 4: Simplify right side
    2,639.88x = 4,949,579.34
  5. Step 5: Solve for x
    x = 4,949,579.34/2,639.88
  6. Step 6: Final answer
    x = 1,874.93

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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.