Home / 259,740.20-389,610.30-218,405.90

Finding the Fourth Proportional to 259,740.20, 389,610.30 and 218,405.90

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Solution

The fourth proportional to 259,740.20, 389,610.30 and 218,405.90 is: 327,608.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,740.20 : 389,610.30 = 218,405.90 : x
  2. Step 2: Convert to fraction form
    259,740.20/389,610.30 = 218,405.90/x
  3. Step 3: Cross multiply
    259,740.20x = 389,610.30 × 218,405.90
  4. Step 4: Simplify right side
    259,740.20x = 85,093,188,220.77
  5. Step 5: Solve for x
    x = 85,093,188,220.77/259,740.20
  6. Step 6: Final answer
    x = 327,608.85

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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.