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Finding the Fourth Proportional to 322,879.20, 484,491.60 and 145,413.60

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Solution

The fourth proportional to 322,879.20, 484,491.60 and 145,413.60 is: 218,198.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    322,879.20 : 484,491.60 = 145,413.60 : x
  2. Step 2: Convert to fraction form
    322,879.20/484,491.60 = 145,413.60/x
  3. Step 3: Cross multiply
    322,879.20x = 484,491.60 × 145,413.60
  4. Step 4: Simplify right side
    322,879.20x = 70,451,667,725.76
  5. Step 5: Solve for x
    x = 70,451,667,725.76/322,879.20
  6. Step 6: Final answer
    x = 218,198.22

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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.