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Finding the Fourth Proportional to 3,959.91, 5,940.27 and 1,186.11

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Solution

The fourth proportional to 3,959.91, 5,940.27 and 1,186.11 is: 1,779.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,959.91 : 5,940.27 = 1,186.11 : x
  2. Step 2: Convert to fraction form
    3,959.91/5,940.27 = 1,186.11/x
  3. Step 3: Cross multiply
    3,959.91x = 5,940.27 × 1,186.11
  4. Step 4: Simplify right side
    3,959.91x = 7,045,813.65
  5. Step 5: Solve for x
    x = 7,045,813.65/3,959.91
  6. Step 6: Final answer
    x = 1,779.29

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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.