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Finding the Fourth Proportional to 259,704.80, 389,557.20 and 231,711.20

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Solution

The fourth proportional to 259,704.80, 389,557.20 and 231,711.20 is: 347,566.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,704.80 : 389,557.20 = 231,711.20 : x
  2. Step 2: Convert to fraction form
    259,704.80/389,557.20 = 231,711.20/x
  3. Step 3: Cross multiply
    259,704.80x = 389,557.20 × 231,711.20
  4. Step 4: Simplify right side
    259,704.80x = 90,264,766,280.64
  5. Step 5: Solve for x
    x = 90,264,766,280.64/259,704.80
  6. Step 6: Final answer
    x = 347,566.80

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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.