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Finding the Fourth Proportional to 3,959.57, 5,939.31 and 1,620.83

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Solution

The fourth proportional to 3,959.57, 5,939.31 and 1,620.83 is: 2,431.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,959.57 : 5,939.31 = 1,620.83 : x
  2. Step 2: Convert to fraction form
    3,959.57/5,939.31 = 1,620.83/x
  3. Step 3: Cross multiply
    3,959.57x = 5,939.31 × 1,620.83
  4. Step 4: Simplify right side
    3,959.57x = 9,626,630.73
  5. Step 5: Solve for x
    x = 9,626,630.73/3,959.57
  6. Step 6: Final answer
    x = 2,431.23

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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.