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Finding the Fourth Proportional to 2,271.75, 3,413.88 and 1,986.09

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Solution

The fourth proportional to 2,271.75, 3,413.88 and 1,986.09 is: 2,984.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,271.75 : 3,413.88 = 1,986.09 : x
  2. Step 2: Convert to fraction form
    2,271.75/3,413.88 = 1,986.09/x
  3. Step 3: Cross multiply
    2,271.75x = 3,413.88 × 1,986.09
  4. Step 4: Simplify right side
    2,271.75x = 6,780,272.93
  5. Step 5: Solve for x
    x = 6,780,272.93/2,271.75
  6. Step 6: Final answer
    x = 2,984.60

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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.