Home / 3,991.40-5,989.83-1,394.34

Finding the Fourth Proportional to 3,991.40, 5,989.83 and 1,394.34

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Solution

The fourth proportional to 3,991.40, 5,989.83 and 1,394.34 is: 2,092.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991.40 : 5,989.83 = 1,394.34 : x
  2. Step 2: Convert to fraction form
    3,991.40/5,989.83 = 1,394.34/x
  3. Step 3: Cross multiply
    3,991.40x = 5,989.83 × 1,394.34
  4. Step 4: Simplify right side
    3,991.40x = 8,351,859.56
  5. Step 5: Solve for x
    x = 8,351,859.56/3,991.40
  6. Step 6: Final answer
    x = 2,092.46

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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.