Home / 3,991.27-5,508.09-2,312.68

Finding the Fourth Proportional to 3,991.27, 5,508.09 and 2,312.68

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Solution

The fourth proportional to 3,991.27, 5,508.09 and 2,312.68 is: 3,191.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991.27 : 5,508.09 = 2,312.68 : x
  2. Step 2: Convert to fraction form
    3,991.27/5,508.09 = 2,312.68/x
  3. Step 3: Cross multiply
    3,991.27x = 5,508.09 × 2,312.68
  4. Step 4: Simplify right side
    3,991.27x = 12,738,449.58
  5. Step 5: Solve for x
    x = 12,738,449.58/3,991.27
  6. Step 6: Final answer
    x = 3,191.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.