Home / 3,991.39-5,989.82-1,394.32

Finding the Fourth Proportional to 3,991.39, 5,989.82 and 1,394.32

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Solution

The fourth proportional to 3,991.39, 5,989.82 and 1,394.32 is: 2,092.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991.39 : 5,989.82 = 1,394.32 : x
  2. Step 2: Convert to fraction form
    3,991.39/5,989.82 = 1,394.32/x
  3. Step 3: Cross multiply
    3,991.39x = 5,989.82 × 1,394.32
  4. Step 4: Simplify right side
    3,991.39x = 8,351,725.82
  5. Step 5: Solve for x
    x = 8,351,725.82/3,991.39
  6. Step 6: Final answer
    x = 2,092.44

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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.