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Finding the Fourth Proportional to 627,911.08, 866,498.34 and 356,003.80

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Solution

The fourth proportional to 627,911.08, 866,498.34 and 356,003.80 is: 491,274.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,911.08 : 866,498.34 = 356,003.80 : x
  2. Step 2: Convert to fraction form
    627,911.08/866,498.34 = 356,003.80/x
  3. Step 3: Cross multiply
    627,911.08x = 866,498.34 × 356,003.80
  4. Step 4: Simplify right side
    627,911.08x = 308,476,701,733.69
  5. Step 5: Solve for x
    x = 308,476,701,733.69/627,911.08
  6. Step 6: Final answer
    x = 491,274.50

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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.