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Finding the Fourth Proportional to 719,836,986.11, 993,375,998.84 and 389,812,694.27

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Solution

The fourth proportional to 719,836,986.11, 993,375,998.84 and 389,812,694.27 is: 537,942,036.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,836,986.11 : 993,375,998.84 = 389,812,694.27 : x
  2. Step 2: Convert to fraction form
    719,836,986.11/993,375,998.84 = 389,812,694.27/x
  3. Step 3: Cross multiply
    719,836,986.11x = 993,375,998.84 × 389,812,694.27
  4. Step 4: Simplify right side
    719,836,986.11x = 387,230,574,529,023,744
  5. Step 5: Solve for x
    x = 387,230,574,529,023,744/719,836,986.11
  6. Step 6: Final answer
    x = 537,942,036.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.