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Finding the Fourth Proportional to 353,564.91, 487,969.83 and 200,640.78

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Solution

The fourth proportional to 353,564.91, 487,969.83 and 200,640.78 is: 276,912.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,564.91 : 487,969.83 = 200,640.78 : x
  2. Step 2: Convert to fraction form
    353,564.91/487,969.83 = 200,640.78/x
  3. Step 3: Cross multiply
    353,564.91x = 487,969.83 × 200,640.78
  4. Step 4: Simplify right side
    353,564.91x = 97,906,647,307.67
  5. Step 5: Solve for x
    x = 97,906,647,307.67/353,564.91
  6. Step 6: Final answer
    x = 276,912.79

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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.