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Finding the Fourth Proportional to 5,682, 7,841.28 and 3,198

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Solution

The fourth proportional to 5,682, 7,841.28 and 3,198 is: 4,413.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,682 : 7,841.28 = 3,198 : x
  2. Step 2: Convert to fraction form
    5,682/7,841.28 = 3,198/x
  3. Step 3: Cross multiply
    5,682x = 7,841.28 × 3,198
  4. Step 4: Simplify right side
    5,682x = 25,076,413.44
  5. Step 5: Solve for x
    x = 25,076,413.44/5,682
  6. Step 6: Final answer
    x = 4,413.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.