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Finding the Fourth Proportional to 3,340.96, 5,007.84 and 1,391.92

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Solution

The fourth proportional to 3,340.96, 5,007.84 and 1,391.92 is: 2,086.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,340.96 : 5,007.84 = 1,391.92 : x
  2. Step 2: Convert to fraction form
    3,340.96/5,007.84 = 1,391.92/x
  3. Step 3: Cross multiply
    3,340.96x = 5,007.84 × 1,391.92
  4. Step 4: Simplify right side
    3,340.96x = 6,970,512.65
  5. Step 5: Solve for x
    x = 6,970,512.65/3,340.96
  6. Step 6: Final answer
    x = 2,086.38

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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.