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Finding the Fourth Proportional to 3,958.92, 5,940.40 and 1,620.65

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Solution

The fourth proportional to 3,958.92, 5,940.40 and 1,620.65 is: 2,431.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,958.92 : 5,940.40 = 1,620.65 : x
  2. Step 2: Convert to fraction form
    3,958.92/5,940.40 = 1,620.65/x
  3. Step 3: Cross multiply
    3,958.92x = 5,940.40 × 1,620.65
  4. Step 4: Simplify right side
    3,958.92x = 9,627,290.36
  5. Step 5: Solve for x
    x = 9,627,290.36/3,958.92
  6. Step 6: Final answer
    x = 2,431.80

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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.