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Finding the Fourth Proportional to 3,879.69, 5,819.64 and 1,416.36

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Solution

The fourth proportional to 3,879.69, 5,819.64 and 1,416.36 is: 2,124.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,879.69 : 5,819.64 = 1,416.36 : x
  2. Step 2: Convert to fraction form
    3,879.69/5,819.64 = 1,416.36/x
  3. Step 3: Cross multiply
    3,879.69x = 5,819.64 × 1,416.36
  4. Step 4: Simplify right side
    3,879.69x = 8,242,705.31
  5. Step 5: Solve for x
    x = 8,242,705.31/3,879.69
  6. Step 6: Final answer
    x = 2,124.58

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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.