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Finding the Fourth Proportional to 667,807,755.96, 921,436,700.22 and 385,545,305.55

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Solution

The fourth proportional to 667,807,755.96, 921,436,700.22 and 385,545,305.55 is: 531,972,848.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,807,755.96 : 921,436,700.22 = 385,545,305.55 : x
  2. Step 2: Convert to fraction form
    667,807,755.96/921,436,700.22 = 385,545,305.55/x
  3. Step 3: Cross multiply
    667,807,755.96x = 921,436,700.22 × 385,545,305.55
  4. Step 4: Simplify right side
    667,807,755.96x = 355,255,594,131,303,680
  5. Step 5: Solve for x
    x = 355,255,594,131,303,680/667,807,755.96
  6. Step 6: Final answer
    x = 531,972,848.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.