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Finding the Fourth Proportional to 419,720.62, 629,766.82 and 219,993.52

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Solution

The fourth proportional to 419,720.62, 629,766.82 and 219,993.52 is: 330,087.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,720.62 : 629,766.82 = 219,993.52 : x
  2. Step 2: Convert to fraction form
    419,720.62/629,766.82 = 219,993.52/x
  3. Step 3: Cross multiply
    419,720.62x = 629,766.82 × 219,993.52
  4. Step 4: Simplify right side
    419,720.62x = 138,544,619,511.01
  5. Step 5: Solve for x
    x = 138,544,619,511.01/419,720.62
  6. Step 6: Final answer
    x = 330,087.71

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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.