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Finding the Fourth Proportional to 3,881.97, 5,819.46 and 1,415.07

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Solution

The fourth proportional to 3,881.97, 5,819.46 and 1,415.07 is: 2,121.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,881.97 : 5,819.46 = 1,415.07 : x
  2. Step 2: Convert to fraction form
    3,881.97/5,819.46 = 1,415.07/x
  3. Step 3: Cross multiply
    3,881.97x = 5,819.46 × 1,415.07
  4. Step 4: Simplify right side
    3,881.97x = 8,234,914.16
  5. Step 5: Solve for x
    x = 8,234,914.16/3,881.97
  6. Step 6: Final answer
    x = 2,121.32

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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.