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Finding the Fourth Proportional to 206,388,212.40, 309,582,318.60 and 190,604,414.70

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Solution

The fourth proportional to 206,388,212.40, 309,582,318.60 and 190,604,414.70 is: 285,906,622.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,388,212.40 : 309,582,318.60 = 190,604,414.70 : x
  2. Step 2: Convert to fraction form
    206,388,212.40/309,582,318.60 = 190,604,414.70/x
  3. Step 3: Cross multiply
    206,388,212.40x = 309,582,318.60 × 190,604,414.70
  4. Step 4: Simplify right side
    206,388,212.40x = 59,007,756,638,221,928
  5. Step 5: Solve for x
    x = 59,007,756,638,221,928/206,388,212.40
  6. Step 6: Final answer
    x = 285,906,622.05

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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.