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Finding the Fourth Proportional to 2,115.44, 3,170.60 and 1,859.44

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Solution

The fourth proportional to 2,115.44, 3,170.60 and 1,859.44 is: 2,786.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.44 : 3,170.60 = 1,859.44 : x
  2. Step 2: Convert to fraction form
    2,115.44/3,170.60 = 1,859.44/x
  3. Step 3: Cross multiply
    2,115.44x = 3,170.60 × 1,859.44
  4. Step 4: Simplify right side
    2,115.44x = 5,895,540.46
  5. Step 5: Solve for x
    x = 5,895,540.46/2,115.44
  6. Step 6: Final answer
    x = 2,786.91

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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.