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Finding the Fourth Proportional to 2,166,978,889.80, 3,250,468,334.70 and 531,203,491.80

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Solution

The fourth proportional to 2,166,978,889.80, 3,250,468,334.70 and 531,203,491.80 is: 796,805,237.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,166,978,889.80 : 3,250,468,334.70 = 531,203,491.80 : x
  2. Step 2: Convert to fraction form
    2,166,978,889.80/3,250,468,334.70 = 531,203,491.80/x
  3. Step 3: Cross multiply
    2,166,978,889.80x = 3,250,468,334.70 × 531,203,491.80
  4. Step 4: Simplify right side
    2,166,978,889.80x = 1,726,660,129,377,970,944
  5. Step 5: Solve for x
    x = 1,726,660,129,377,970,944/2,166,978,889.80
  6. Step 6: Final answer
    x = 796,805,237.70

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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.