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Finding the Fourth Proportional to 521,185.89, 781,787.07 and 205,640.07

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Solution

The fourth proportional to 521,185.89, 781,787.07 and 205,640.07 is: 308,463.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,185.89 : 781,787.07 = 205,640.07 : x
  2. Step 2: Convert to fraction form
    521,185.89/781,787.07 = 205,640.07/x
  3. Step 3: Cross multiply
    521,185.89x = 781,787.07 × 205,640.07
  4. Step 4: Simplify right side
    521,185.89x = 160,766,747,799.90
  5. Step 5: Solve for x
    x = 160,766,747,799.90/521,185.89
  6. Step 6: Final answer
    x = 308,463.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.