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Finding the Fourth Proportional to 3,878.91, 5,817.15 and 1,413.27

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Solution

The fourth proportional to 3,878.91, 5,817.15 and 1,413.27 is: 2,119.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,878.91 : 5,817.15 = 1,413.27 : x
  2. Step 2: Convert to fraction form
    3,878.91/5,817.15 = 1,413.27/x
  3. Step 3: Cross multiply
    3,878.91x = 5,817.15 × 1,413.27
  4. Step 4: Simplify right side
    3,878.91x = 8,221,203.58
  5. Step 5: Solve for x
    x = 8,221,203.58/3,878.91
  6. Step 6: Final answer
    x = 2,119.46

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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.