Home / 3,989.26-5,505.09-2,310.75

Finding the Fourth Proportional to 3,989.26, 5,505.09 and 2,310.75

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Solution

The fourth proportional to 3,989.26, 5,505.09 and 2,310.75 is: 3,188.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,989.26 : 5,505.09 = 2,310.75 : x
  2. Step 2: Convert to fraction form
    3,989.26/5,505.09 = 2,310.75/x
  3. Step 3: Cross multiply
    3,989.26x = 5,505.09 × 2,310.75
  4. Step 4: Simplify right side
    3,989.26x = 12,720,886.72
  5. Step 5: Solve for x
    x = 12,720,886.72/3,989.26
  6. Step 6: Final answer
    x = 3,188.78

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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.