Home / 3,109.85-4,664.61-1,161.90

Finding the Fourth Proportional to 3,109.85, 4,664.61 and 1,161.90

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Solution

The fourth proportional to 3,109.85, 4,664.61 and 1,161.90 is: 1,742.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,109.85 : 4,664.61 = 1,161.90 : x
  2. Step 2: Convert to fraction form
    3,109.85/4,664.61 = 1,161.90/x
  3. Step 3: Cross multiply
    3,109.85x = 4,664.61 × 1,161.90
  4. Step 4: Simplify right side
    3,109.85x = 5,419,810.36
  5. Step 5: Solve for x
    x = 5,419,810.36/3,109.85
  6. Step 6: Final answer
    x = 1,742.79

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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.