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Finding the Fourth Proportional to 3,205.65, 4,423.85 and 1,789.48

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Solution

The fourth proportional to 3,205.65, 4,423.85 and 1,789.48 is: 2,469.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,205.65 : 4,423.85 = 1,789.48 : x
  2. Step 2: Convert to fraction form
    3,205.65/4,423.85 = 1,789.48/x
  3. Step 3: Cross multiply
    3,205.65x = 4,423.85 × 1,789.48
  4. Step 4: Simplify right side
    3,205.65x = 7,916,391.10
  5. Step 5: Solve for x
    x = 7,916,391.10/3,205.65
  6. Step 6: Final answer
    x = 2,469.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.