Home / 3,131.80-4,694.61-1,377.75

Finding the Fourth Proportional to 3,131.80, 4,694.61 and 1,377.75

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Solution

The fourth proportional to 3,131.80, 4,694.61 and 1,377.75 is: 2,065.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.80 : 4,694.61 = 1,377.75 : x
  2. Step 2: Convert to fraction form
    3,131.80/4,694.61 = 1,377.75/x
  3. Step 3: Cross multiply
    3,131.80x = 4,694.61 × 1,377.75
  4. Step 4: Simplify right side
    3,131.80x = 6,467,998.93
  5. Step 5: Solve for x
    x = 6,467,998.93/3,131.80
  6. Step 6: Final answer
    x = 2,065.27

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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.