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Finding the Fourth Proportional to 627,761.28, 866,378.20 and 355,799.93

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Solution

The fourth proportional to 627,761.28, 866,378.20 and 355,799.93 is: 491,042.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,761.28 : 866,378.20 = 355,799.93 : x
  2. Step 2: Convert to fraction form
    627,761.28/866,378.20 = 355,799.93/x
  3. Step 3: Cross multiply
    627,761.28x = 866,378.20 × 355,799.93
  4. Step 4: Simplify right side
    627,761.28x = 308,257,304,189.97
  5. Step 5: Solve for x
    x = 308,257,304,189.97/627,761.28
  6. Step 6: Final answer
    x = 491,042.24

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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.