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Finding the Fourth Proportional to 279,163.80, 418,745.70 and 259,480.80

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Solution

The fourth proportional to 279,163.80, 418,745.70 and 259,480.80 is: 389,221.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,163.80 : 418,745.70 = 259,480.80 : x
  2. Step 2: Convert to fraction form
    279,163.80/418,745.70 = 259,480.80/x
  3. Step 3: Cross multiply
    279,163.80x = 418,745.70 × 259,480.80
  4. Step 4: Simplify right side
    279,163.80x = 108,656,469,232.56
  5. Step 5: Solve for x
    x = 108,656,469,232.56/279,163.80
  6. Step 6: Final answer
    x = 389,221.20

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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.