Home / 3,109.40-4,664.40-1,161.75

Finding the Fourth Proportional to 3,109.40, 4,664.40 and 1,161.75

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Solution

The fourth proportional to 3,109.40, 4,664.40 and 1,161.75 is: 1,742.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,109.40 : 4,664.40 = 1,161.75 : x
  2. Step 2: Convert to fraction form
    3,109.40/4,664.40 = 1,161.75/x
  3. Step 3: Cross multiply
    3,109.40x = 4,664.40 × 1,161.75
  4. Step 4: Simplify right side
    3,109.40x = 5,418,866.70
  5. Step 5: Solve for x
    x = 5,418,866.70/3,109.40
  6. Step 6: Final answer
    x = 1,742.74

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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.