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Finding the Fourth Proportional to 721,961.75, 994,081.87 and 641,249.03

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Solution

The fourth proportional to 721,961.75, 994,081.87 and 641,249.03 is: 882,947.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,961.75 : 994,081.87 = 641,249.03 : x
  2. Step 2: Convert to fraction form
    721,961.75/994,081.87 = 641,249.03/x
  3. Step 3: Cross multiply
    721,961.75x = 994,081.87 × 641,249.03
  4. Step 4: Simplify right side
    721,961.75x = 637,454,034,878.09
  5. Step 5: Solve for x
    x = 637,454,034,878.09/721,961.75
  6. Step 6: Final answer
    x = 882,947.10

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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.