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Finding the Fourth Proportional to 698,249.78, 963,585.33 and 396,443.78

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Solution

The fourth proportional to 698,249.78, 963,585.33 and 396,443.78 is: 547,092.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    698,249.78 : 963,585.33 = 396,443.78 : x
  2. Step 2: Convert to fraction form
    698,249.78/963,585.33 = 396,443.78/x
  3. Step 3: Cross multiply
    698,249.78x = 963,585.33 × 396,443.78
  4. Step 4: Simplify right side
    698,249.78x = 382,007,410,577.75
  5. Step 5: Solve for x
    x = 382,007,410,577.75/698,249.78
  6. Step 6: Final answer
    x = 547,092.78

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Double scale
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1.5x scale

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.