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Finding the Fourth Proportional to 627,934.86, 866,523.74 and 356,021.05

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Solution

The fourth proportional to 627,934.86, 866,523.74 and 356,021.05 is: 491,294.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,934.86 : 866,523.74 = 356,021.05 : x
  2. Step 2: Convert to fraction form
    627,934.86/866,523.74 = 356,021.05/x
  3. Step 3: Cross multiply
    627,934.86x = 866,523.74 × 356,021.05
  4. Step 4: Simplify right side
    627,934.86x = 308,500,689,759.54
  5. Step 5: Solve for x
    x = 308,500,689,759.54/627,934.86
  6. Step 6: Final answer
    x = 491,294.10

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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.