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Finding the Fourth Proportional to 643,624.94, 888,374.76 and 401,761.92

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Solution

The fourth proportional to 643,624.94, 888,374.76 and 401,761.92 is: 554,539.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,624.94 : 888,374.76 = 401,761.92 : x
  2. Step 2: Convert to fraction form
    643,624.94/888,374.76 = 401,761.92/x
  3. Step 3: Cross multiply
    643,624.94x = 888,374.76 × 401,761.92
  4. Step 4: Simplify right side
    643,624.94x = 356,915,149,257.14
  5. Step 5: Solve for x
    x = 356,915,149,257.14/643,624.94
  6. Step 6: Final answer
    x = 554,539.03

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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.