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Finding the Fourth Proportional to 618,355,953.54, 853,326,185.85 and 339,894,516.42

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Solution

The fourth proportional to 618,355,953.54, 853,326,185.85 and 339,894,516.42 is: 469,051,667.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,355,953.54 : 853,326,185.85 = 339,894,516.42 : x
  2. Step 2: Convert to fraction form
    618,355,953.54/853,326,185.85 = 339,894,516.42/x
  3. Step 3: Cross multiply
    618,355,953.54x = 853,326,185.85 × 339,894,516.42
  4. Step 4: Simplify right side
    618,355,953.54x = 290,040,891,288,008,832
  5. Step 5: Solve for x
    x = 290,040,891,288,008,832/618,355,953.54
  6. Step 6: Final answer
    x = 469,051,667.78

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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.