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Finding the Fourth Proportional to 3,889.09, 5,834.63 and 1,115.95

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Solution

The fourth proportional to 3,889.09, 5,834.63 and 1,115.95 is: 1,674.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,889.09 : 5,834.63 = 1,115.95 : x
  2. Step 2: Convert to fraction form
    3,889.09/5,834.63 = 1,115.95/x
  3. Step 3: Cross multiply
    3,889.09x = 5,834.63 × 1,115.95
  4. Step 4: Simplify right side
    3,889.09x = 6,511,170.90
  5. Step 5: Solve for x
    x = 6,511,170.90/3,889.09
  6. Step 6: Final answer
    x = 1,674.22

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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.