Home / 3,999.68-5,519.36-2,231.44

Finding the Fourth Proportional to 3,999.68, 5,519.36 and 2,231.44

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Solution

The fourth proportional to 3,999.68, 5,519.36 and 2,231.44 is: 3,079.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,999.68 : 5,519.36 = 2,231.44 : x
  2. Step 2: Convert to fraction form
    3,999.68/5,519.36 = 2,231.44/x
  3. Step 3: Cross multiply
    3,999.68x = 5,519.36 × 2,231.44
  4. Step 4: Simplify right side
    3,999.68x = 12,316,120.68
  5. Step 5: Solve for x
    x = 12,316,120.68/3,999.68
  6. Step 6: Final answer
    x = 3,079.28

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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.