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Finding the Fourth Proportional to 641,169.84, 884,846.68 and 386,603.12

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Solution

The fourth proportional to 641,169.84, 884,846.68 and 386,603.12 is: 533,531.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,169.84 : 884,846.68 = 386,603.12 : x
  2. Step 2: Convert to fraction form
    641,169.84/884,846.68 = 386,603.12/x
  3. Step 3: Cross multiply
    641,169.84x = 884,846.68 × 386,603.12
  4. Step 4: Simplify right side
    641,169.84x = 342,084,487,209.64
  5. Step 5: Solve for x
    x = 342,084,487,209.64/641,169.84
  6. Step 6: Final answer
    x = 533,531.78

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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.