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Finding the Fourth Proportional to 3,991.08, 5,986.65 and 1,394.01

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Solution

The fourth proportional to 3,991.08, 5,986.65 and 1,394.01 is: 2,091.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991.08 : 5,986.65 = 1,394.01 : x
  2. Step 2: Convert to fraction form
    3,991.08/5,986.65 = 1,394.01/x
  3. Step 3: Cross multiply
    3,991.08x = 5,986.65 × 1,394.01
  4. Step 4: Simplify right side
    3,991.08x = 8,345,449.97
  5. Step 5: Solve for x
    x = 8,345,449.97/3,991.08
  6. Step 6: Final answer
    x = 2,091.03

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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.