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Finding the Fourth Proportional to 698,443.66, 963,858.99 and 396,639.82

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Solution

The fourth proportional to 698,443.66, 963,858.99 and 396,639.82 is: 547,366.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    698,443.66 : 963,858.99 = 396,639.82 : x
  2. Step 2: Convert to fraction form
    698,443.66/963,858.99 = 396,639.82/x
  3. Step 3: Cross multiply
    698,443.66x = 963,858.99 × 396,639.82
  4. Step 4: Simplify right side
    698,443.66x = 382,304,856,298.98
  5. Step 5: Solve for x
    x = 382,304,856,298.98/698,443.66
  6. Step 6: Final answer
    x = 547,366.78

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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.