Home / 3,918.80-5,872.86-1,724.78

Finding the Fourth Proportional to 3,918.80, 5,872.86 and 1,724.78

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Solution

The fourth proportional to 3,918.80, 5,872.86 and 1,724.78 is: 2,584.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918.80 : 5,872.86 = 1,724.78 : x
  2. Step 2: Convert to fraction form
    3,918.80/5,872.86 = 1,724.78/x
  3. Step 3: Cross multiply
    3,918.80x = 5,872.86 × 1,724.78
  4. Step 4: Simplify right side
    3,918.80x = 10,129,391.47
  5. Step 5: Solve for x
    x = 10,129,391.47/3,918.80
  6. Step 6: Final answer
    x = 2,584.82

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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.