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Finding the Fourth Proportional to 3,917.36, 5,879.28 and 2,940.32

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Solution

The fourth proportional to 3,917.36, 5,879.28 and 2,940.32 is: 4,412.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,917.36 : 5,879.28 = 2,940.32 : x
  2. Step 2: Convert to fraction form
    3,917.36/5,879.28 = 2,940.32/x
  3. Step 3: Cross multiply
    3,917.36x = 5,879.28 × 2,940.32
  4. Step 4: Simplify right side
    3,917.36x = 17,286,964.57
  5. Step 5: Solve for x
    x = 17,286,964.57/3,917.36
  6. Step 6: Final answer
    x = 4,412.91

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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.