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Finding the Fourth Proportional to 263,431.80, 395,147.70 and 259,932.60

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Solution

The fourth proportional to 263,431.80, 395,147.70 and 259,932.60 is: 389,898.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,431.80 : 395,147.70 = 259,932.60 : x
  2. Step 2: Convert to fraction form
    263,431.80/395,147.70 = 259,932.60/x
  3. Step 3: Cross multiply
    263,431.80x = 395,147.70 × 259,932.60
  4. Step 4: Simplify right side
    263,431.80x = 102,711,769,045.02
  5. Step 5: Solve for x
    x = 102,711,769,045.02/263,431.80
  6. Step 6: Final answer
    x = 389,898.90

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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.