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Finding the Fourth Proportional to 641,568.40, 885,304.41 and 383,394.11

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Solution

The fourth proportional to 641,568.40, 885,304.41 and 383,394.11 is: 529,048.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,568.40 : 885,304.41 = 383,394.11 : x
  2. Step 2: Convert to fraction form
    641,568.40/885,304.41 = 383,394.11/x
  3. Step 3: Cross multiply
    641,568.40x = 885,304.41 × 383,394.11
  4. Step 4: Simplify right side
    641,568.40x = 339,420,496,351.03
  5. Step 5: Solve for x
    x = 339,420,496,351.03/641,568.40
  6. Step 6: Final answer
    x = 529,048.03

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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.