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Finding the Fourth Proportional to 3,999.85, 5,999.09 and 1,808.08

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Solution

The fourth proportional to 3,999.85, 5,999.09 and 1,808.08 is: 2,711.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,999.85 : 5,999.09 = 1,808.08 : x
  2. Step 2: Convert to fraction form
    3,999.85/5,999.09 = 1,808.08/x
  3. Step 3: Cross multiply
    3,999.85x = 5,999.09 × 1,808.08
  4. Step 4: Simplify right side
    3,999.85x = 10,846,834.65
  5. Step 5: Solve for x
    x = 10,846,834.65/3,999.85
  6. Step 6: Final answer
    x = 2,711.81

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1.5x scale

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.