Home / 3,999.39-5,519.10-2,231.02

Finding the Fourth Proportional to 3,999.39, 5,519.10 and 2,231.02

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Solution

The fourth proportional to 3,999.39, 5,519.10 and 2,231.02 is: 3,078.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,999.39 : 5,519.10 = 2,231.02 : x
  2. Step 2: Convert to fraction form
    3,999.39/5,519.10 = 2,231.02/x
  3. Step 3: Cross multiply
    3,999.39x = 5,519.10 × 2,231.02
  4. Step 4: Simplify right side
    3,999.39x = 12,313,222.48
  5. Step 5: Solve for x
    x = 12,313,222.48/3,999.39
  6. Step 6: Final answer
    x = 3,078.78

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1.5x scale

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.