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Finding the Fourth Proportional to 641,413.26, 962,109.78 and 220,692.78

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Solution

The fourth proportional to 641,413.26, 962,109.78 and 220,692.78 is: 331,035.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,413.26 : 962,109.78 = 220,692.78 : x
  2. Step 2: Convert to fraction form
    641,413.26/962,109.78 = 220,692.78/x
  3. Step 3: Cross multiply
    641,413.26x = 962,109.78 × 220,692.78
  4. Step 4: Simplify right side
    641,413.26x = 212,330,682,013.39
  5. Step 5: Solve for x
    x = 212,330,682,013.39/641,413.26
  6. Step 6: Final answer
    x = 331,035.69

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1.5x scale

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.