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Finding the Fourth Proportional to 221,959,936.80, 332,939,905.20 and 221,959,936.80

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Solution

The fourth proportional to 221,959,936.80, 332,939,905.20 and 221,959,936.80 is: 332,939,905.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,959,936.80 : 332,939,905.20 = 221,959,936.80 : x
  2. Step 2: Convert to fraction form
    221,959,936.80/332,939,905.20 = 221,959,936.80/x
  3. Step 3: Cross multiply
    221,959,936.80x = 332,939,905.20 × 221,959,936.80
  4. Step 4: Simplify right side
    221,959,936.80x = 73,899,320,316,390,000
  5. Step 5: Solve for x
    x = 73,899,320,316,390,000/221,959,936.80
  6. Step 6: Final answer
    x = 332,939,905.20

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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.