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Finding the Fourth Proportional to 3,393.98, 5,091.22 and 2,163.80

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Solution

The fourth proportional to 3,393.98, 5,091.22 and 2,163.80 is: 3,245.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,393.98 : 5,091.22 = 2,163.80 : x
  2. Step 2: Convert to fraction form
    3,393.98/5,091.22 = 2,163.80/x
  3. Step 3: Cross multiply
    3,393.98x = 5,091.22 × 2,163.80
  4. Step 4: Simplify right side
    3,393.98x = 11,016,381.84
  5. Step 5: Solve for x
    x = 11,016,381.84/3,393.98
  6. Step 6: Final answer
    x = 3,245.86

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1.5x scale

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.