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Finding the Fourth Proportional to 621,131,569.20, 930,906,097.20 and 330,138,097.20

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Solution

The fourth proportional to 621,131,569.20, 930,906,097.20 and 330,138,097.20 is: 494,786,584.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,131,569.20 : 930,906,097.20 = 330,138,097.20 : x
  2. Step 2: Convert to fraction form
    621,131,569.20/930,906,097.20 = 330,138,097.20/x
  3. Step 3: Cross multiply
    621,131,569.20x = 930,906,097.20 × 330,138,097.20
  4. Step 4: Simplify right side
    621,131,569.20x = 307,327,567,601,486,272
  5. Step 5: Solve for x
    x = 307,327,567,601,486,272/621,131,569.20
  6. Step 6: Final answer
    x = 494,786,584.42

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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.