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Finding the Fourth Proportional to 689,617.97, 951,657.88 and 399,241.85

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Solution

The fourth proportional to 689,617.97, 951,657.88 and 399,241.85 is: 550,945.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,617.97 : 951,657.88 = 399,241.85 : x
  2. Step 2: Convert to fraction form
    689,617.97/951,657.88 = 399,241.85/x
  3. Step 3: Cross multiply
    689,617.97x = 951,657.88 × 399,241.85
  4. Step 4: Simplify right side
    689,617.97x = 379,941,652,578.28
  5. Step 5: Solve for x
    x = 379,941,652,578.28/689,617.97
  6. Step 6: Final answer
    x = 550,945.12

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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.