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Finding the Fourth Proportional to 259,563.20, 389,474.40 and 147,329.60

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Solution

The fourth proportional to 259,563.20, 389,474.40 and 147,329.60 is: 221,067.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,563.20 : 389,474.40 = 147,329.60 : x
  2. Step 2: Convert to fraction form
    259,563.20/389,474.40 = 147,329.60/x
  3. Step 3: Cross multiply
    259,563.20x = 389,474.40 × 147,329.60
  4. Step 4: Simplify right side
    259,563.20x = 57,381,107,562.24
  5. Step 5: Solve for x
    x = 57,381,107,562.24/259,563.20
  6. Step 6: Final answer
    x = 221,067.96

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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.