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Finding the Fourth Proportional to 221,993,979.80, 332,990,969.70 and 218,592,757.40

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Solution

The fourth proportional to 221,993,979.80, 332,990,969.70 and 218,592,757.40 is: 327,889,136.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,993,979.80 : 332,990,969.70 = 218,592,757.40 : x
  2. Step 2: Convert to fraction form
    221,993,979.80/332,990,969.70 = 218,592,757.40/x
  3. Step 3: Cross multiply
    221,993,979.80x = 332,990,969.70 × 218,592,757.40
  4. Step 4: Simplify right side
    221,993,979.80x = 72,789,414,256,022,848
  5. Step 5: Solve for x
    x = 72,789,414,256,022,848/221,993,979.80
  6. Step 6: Final answer
    x = 327,889,136.10

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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.