Home / 3,910.78-5,399.61-2,729.80

Finding the Fourth Proportional to 3,910.78, 5,399.61 and 2,729.80

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Solution

The fourth proportional to 3,910.78, 5,399.61 and 2,729.80 is: 3,769.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,910.78 : 5,399.61 = 2,729.80 : x
  2. Step 2: Convert to fraction form
    3,910.78/5,399.61 = 2,729.80/x
  3. Step 3: Cross multiply
    3,910.78x = 5,399.61 × 2,729.80
  4. Step 4: Simplify right side
    3,910.78x = 14,739,867.25
  5. Step 5: Solve for x
    x = 14,739,867.25/3,910.78
  6. Step 6: Final answer
    x = 3,769.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.