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Finding the Fourth Proportional to 643,396.97, 965,243.72 and 222,672.85

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Solution

The fourth proportional to 643,396.97, 965,243.72 and 222,672.85 is: 334,060.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,396.97 : 965,243.72 = 222,672.85 : x
  2. Step 2: Convert to fraction form
    643,396.97/965,243.72 = 222,672.85/x
  3. Step 3: Cross multiply
    643,396.97x = 965,243.72 × 222,672.85
  4. Step 4: Simplify right side
    643,396.97x = 214,933,568,220.58
  5. Step 5: Solve for x
    x = 214,933,568,220.58/643,396.97
  6. Step 6: Final answer
    x = 334,060.58

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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.