Home / 3,990.72-5,507.20-2,222.66

Finding the Fourth Proportional to 3,990.72, 5,507.20 and 2,222.66

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Solution

The fourth proportional to 3,990.72, 5,507.20 and 2,222.66 is: 3,067.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.72 : 5,507.20 = 2,222.66 : x
  2. Step 2: Convert to fraction form
    3,990.72/5,507.20 = 2,222.66/x
  3. Step 3: Cross multiply
    3,990.72x = 5,507.20 × 2,222.66
  4. Step 4: Simplify right side
    3,990.72x = 12,240,633.15
  5. Step 5: Solve for x
    x = 12,240,633.15/3,990.72
  6. Step 6: Final answer
    x = 3,067.27

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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.