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Finding the Fourth Proportional to 3,879.32, 5,819.09 and 1,415.97

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Solution

The fourth proportional to 3,879.32, 5,819.09 and 1,415.97 is: 2,124.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,879.32 : 5,819.09 = 1,415.97 : x
  2. Step 2: Convert to fraction form
    3,879.32/5,819.09 = 1,415.97/x
  3. Step 3: Cross multiply
    3,879.32x = 5,819.09 × 1,415.97
  4. Step 4: Simplify right side
    3,879.32x = 8,239,649.79
  5. Step 5: Solve for x
    x = 8,239,649.79/3,879.32
  6. Step 6: Final answer
    x = 2,124.00

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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.