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Finding the Fourth Proportional to 664,873, 917,591.14 and 396,601

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Solution

The fourth proportional to 664,873, 917,591.14 and 396,601 is: 547,348.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,873 : 917,591.14 = 396,601 : x
  2. Step 2: Convert to fraction form
    664,873/917,591.14 = 396,601/x
  3. Step 3: Cross multiply
    664,873x = 917,591.14 × 396,601
  4. Step 4: Simplify right side
    664,873x = 363,917,563,715.14
  5. Step 5: Solve for x
    x = 363,917,563,715.14/664,873
  6. Step 6: Final answer
    x = 547,348.99

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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.