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Finding the Fourth Proportional to 3,413.88, 4,711.16 and 1,921.82

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Solution

The fourth proportional to 3,413.88, 4,711.16 and 1,921.82 is: 2,652.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,413.88 : 4,711.16 = 1,921.82 : x
  2. Step 2: Convert to fraction form
    3,413.88/4,711.16 = 1,921.82/x
  3. Step 3: Cross multiply
    3,413.88x = 4,711.16 × 1,921.82
  4. Step 4: Simplify right side
    3,413.88x = 9,053,982.76
  5. Step 5: Solve for x
    x = 9,053,982.76/3,413.88
  6. Step 6: Final answer
    x = 2,652.11

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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.