Home / 3,991.28-5,987.84-1,910.66

Finding the Fourth Proportional to 3,991.28, 5,987.84 and 1,910.66

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Solution

The fourth proportional to 3,991.28, 5,987.84 and 1,910.66 is: 2,866.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991.28 : 5,987.84 = 1,910.66 : x
  2. Step 2: Convert to fraction form
    3,991.28/5,987.84 = 1,910.66/x
  3. Step 3: Cross multiply
    3,991.28x = 5,987.84 × 1,910.66
  4. Step 4: Simplify right side
    3,991.28x = 11,440,686.88
  5. Step 5: Solve for x
    x = 11,440,686.88/3,991.28
  6. Step 6: Final answer
    x = 2,866.42

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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.