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Finding the Fourth Proportional to 641,744.97, 885,330 and 386,954.61

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Solution

The fourth proportional to 641,744.97, 885,330 and 386,954.61 is: 533,829.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,744.97 : 885,330 = 386,954.61 : x
  2. Step 2: Convert to fraction form
    641,744.97/885,330 = 386,954.61/x
  3. Step 3: Cross multiply
    641,744.97x = 885,330 × 386,954.61
  4. Step 4: Simplify right side
    641,744.97x = 342,582,524,871.30
  5. Step 5: Solve for x
    x = 342,582,524,871.30/641,744.97
  6. Step 6: Final answer
    x = 533,829.70

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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.