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Finding the Fourth Proportional to 419,645.59, 629,654.44 and 219,918.49

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Solution

The fourth proportional to 419,645.59, 629,654.44 and 219,918.49 is: 329,975.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,645.59 : 629,654.44 = 219,918.49 : x
  2. Step 2: Convert to fraction form
    419,645.59/629,654.44 = 219,918.49/x
  3. Step 3: Cross multiply
    419,645.59x = 629,654.44 × 219,918.49
  4. Step 4: Simplify right side
    419,645.59x = 138,472,653,666.60
  5. Step 5: Solve for x
    x = 138,472,653,666.60/419,645.59
  6. Step 6: Final answer
    x = 329,975.24

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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.