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Finding the Fourth Proportional to 627,718.39, 866,233.11 and 355,811.29

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Solution

The fourth proportional to 627,718.39, 866,233.11 and 355,811.29 is: 491,009.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,718.39 : 866,233.11 = 355,811.29 : x
  2. Step 2: Convert to fraction form
    627,718.39/866,233.11 = 355,811.29/x
  3. Step 3: Cross multiply
    627,718.39x = 866,233.11 × 355,811.29
  4. Step 4: Simplify right side
    627,718.39x = 308,215,520,309.81
  5. Step 5: Solve for x
    x = 308,215,520,309.81/627,718.39
  6. Step 6: Final answer
    x = 491,009.23

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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.