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Finding the Fourth Proportional to 298,936,857.60, 448,405,286.40 and 137,378,793.60

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Solution

The fourth proportional to 298,936,857.60, 448,405,286.40 and 137,378,793.60 is: 206,068,190.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,936,857.60 : 448,405,286.40 = 137,378,793.60 : x
  2. Step 2: Convert to fraction form
    298,936,857.60/448,405,286.40 = 137,378,793.60/x
  3. Step 3: Cross multiply
    298,936,857.60x = 448,405,286.40 × 137,378,793.60
  4. Step 4: Simplify right side
    298,936,857.60x = 61,601,377,289,494,480
  5. Step 5: Solve for x
    x = 61,601,377,289,494,480/298,936,857.60
  6. Step 6: Final answer
    x = 206,068,190.40

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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.