Home / 2,089.80-3,131.66-789.75

Finding the Fourth Proportional to 2,089.80, 3,131.66 and 789.75

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Solution

The fourth proportional to 2,089.80, 3,131.66 and 789.75 is: 1,183.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,089.80 : 3,131.66 = 789.75 : x
  2. Step 2: Convert to fraction form
    2,089.80/3,131.66 = 789.75/x
  3. Step 3: Cross multiply
    2,089.80x = 3,131.66 × 789.75
  4. Step 4: Simplify right side
    2,089.80x = 2,473,230.46
  5. Step 5: Solve for x
    x = 2,473,230.46/2,089.80
  6. Step 6: Final answer
    x = 1,183.48

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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.