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Finding the Fourth Proportional to 408,672,357.40, 613,008,536.10 and 214,508,747.80

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Solution

The fourth proportional to 408,672,357.40, 613,008,536.10 and 214,508,747.80 is: 321,763,121.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,672,357.40 : 613,008,536.10 = 214,508,747.80 : x
  2. Step 2: Convert to fraction form
    408,672,357.40/613,008,536.10 = 214,508,747.80/x
  3. Step 3: Cross multiply
    408,672,357.40x = 613,008,536.10 × 214,508,747.80
  4. Step 4: Simplify right side
    408,672,357.40x = 131,495,693,469,522,112
  5. Step 5: Solve for x
    x = 131,495,693,469,522,112/408,672,357.40
  6. Step 6: Final answer
    x = 321,763,121.70

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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.