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Finding the Fourth Proportional to 878,640.81, 1,212,511.19 and 496,654.17

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Solution

The fourth proportional to 878,640.81, 1,212,511.19 and 496,654.17 is: 685,375.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,640.81 : 1,212,511.19 = 496,654.17 : x
  2. Step 2: Convert to fraction form
    878,640.81/1,212,511.19 = 496,654.17/x
  3. Step 3: Cross multiply
    878,640.81x = 1,212,511.19 × 496,654.17
  4. Step 4: Simplify right side
    878,640.81x = 602,198,736,201.89
  5. Step 5: Solve for x
    x = 602,198,736,201.89/878,640.81
  6. Step 6: Final answer
    x = 685,375.33

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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.