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Finding the Fourth Proportional to 407,998,553.88, 612,117,903.27 and 131,644,583.78

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Solution

The fourth proportional to 407,998,553.88, 612,117,903.27 and 131,644,583.78 is: 197,505,618.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,998,553.88 : 612,117,903.27 = 131,644,583.78 : x
  2. Step 2: Convert to fraction form
    407,998,553.88/612,117,903.27 = 131,644,583.78/x
  3. Step 3: Cross multiply
    407,998,553.88x = 612,117,903.27 × 131,644,583.78
  4. Step 4: Simplify right side
    407,998,553.88x = 80,582,006,597,204,864
  5. Step 5: Solve for x
    x = 80,582,006,597,204,864/407,998,553.88
  6. Step 6: Final answer
    x = 197,505,618.17

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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.