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Finding the Fourth Proportional to 3,878.44, 5,819.21 and 1,413.43

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Solution

The fourth proportional to 3,878.44, 5,819.21 and 1,413.43 is: 2,120.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,878.44 : 5,819.21 = 1,413.43 : x
  2. Step 2: Convert to fraction form
    3,878.44/5,819.21 = 1,413.43/x
  3. Step 3: Cross multiply
    3,878.44x = 5,819.21 × 1,413.43
  4. Step 4: Simplify right side
    3,878.44x = 8,225,045.99
  5. Step 5: Solve for x
    x = 8,225,045.99/3,878.44
  6. Step 6: Final answer
    x = 2,120.71

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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.