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Finding the Fourth Proportional to 627,690.20, 866,227.38 and 355,785.80

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Solution

The fourth proportional to 627,690.20, 866,227.38 and 355,785.80 is: 490,992.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,690.20 : 866,227.38 = 355,785.80 : x
  2. Step 2: Convert to fraction form
    627,690.20/866,227.38 = 355,785.80/x
  3. Step 3: Cross multiply
    627,690.20x = 866,227.38 × 355,785.80
  4. Step 4: Simplify right side
    627,690.20x = 308,191,401,375.20
  5. Step 5: Solve for x
    x = 308,191,401,375.20/627,690.20
  6. Step 6: Final answer
    x = 490,992.85

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1.5x scale

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.