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Finding the Fourth Proportional to 259,560.20, 389,413.20 and 126,444.80

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Solution

The fourth proportional to 259,560.20, 389,413.20 and 126,444.80 is: 189,702.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,560.20 : 389,413.20 = 126,444.80 : x
  2. Step 2: Convert to fraction form
    259,560.20/389,413.20 = 126,444.80/x
  3. Step 3: Cross multiply
    259,560.20x = 389,413.20 × 126,444.80
  4. Step 4: Simplify right side
    259,560.20x = 49,239,274,191.36
  5. Step 5: Solve for x
    x = 49,239,274,191.36/259,560.20
  6. Step 6: Final answer
    x = 189,702.71

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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.