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Finding the Fourth Proportional to 2,789.99, 4,185.03 and 1,328.85

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Solution

The fourth proportional to 2,789.99, 4,185.03 and 1,328.85 is: 1,993.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,789.99 : 4,185.03 = 1,328.85 : x
  2. Step 2: Convert to fraction form
    2,789.99/4,185.03 = 1,328.85/x
  3. Step 3: Cross multiply
    2,789.99x = 4,185.03 × 1,328.85
  4. Step 4: Simplify right side
    2,789.99x = 5,561,277.12
  5. Step 5: Solve for x
    x = 5,561,277.12/2,789.99
  6. Step 6: Final answer
    x = 1,993.30

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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.