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Finding the Fourth Proportional to 722,339,737.78, 996,833,939.97 and 392,314,876.78

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Solution

The fourth proportional to 722,339,737.78, 996,833,939.97 and 392,314,876.78 is: 541,397,300.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,339,737.78 : 996,833,939.97 = 392,314,876.78 : x
  2. Step 2: Convert to fraction form
    722,339,737.78/996,833,939.97 = 392,314,876.78/x
  3. Step 3: Cross multiply
    722,339,737.78x = 996,833,939.97 × 392,314,876.78
  4. Step 4: Simplify right side
    722,339,737.78x = 391,072,784,329,452,480
  5. Step 5: Solve for x
    x = 391,072,784,329,452,480/722,339,737.78
  6. Step 6: Final answer
    x = 541,397,300.85

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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.