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Finding the Fourth Proportional to 627,694.25, 866,199.81 and 355,787.17

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Solution

The fourth proportional to 627,694.25, 866,199.81 and 355,787.17 is: 490,975.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,694.25 : 866,199.81 = 355,787.17 : x
  2. Step 2: Convert to fraction form
    627,694.25/866,199.81 = 355,787.17/x
  3. Step 3: Cross multiply
    627,694.25x = 866,199.81 × 355,787.17
  4. Step 4: Simplify right side
    627,694.25x = 308,182,774,723.44
  5. Step 5: Solve for x
    x = 308,182,774,723.44/627,694.25
  6. Step 6: Final answer
    x = 490,975.94

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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.