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Finding the Fourth Proportional to 627,781.83, 866,766.69 and 421,359.72

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Solution

The fourth proportional to 627,781.83, 866,766.69 and 421,359.72 is: 581,763.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,781.83 : 866,766.69 = 421,359.72 : x
  2. Step 2: Convert to fraction form
    627,781.83/866,766.69 = 421,359.72/x
  3. Step 3: Cross multiply
    627,781.83x = 866,766.69 × 421,359.72
  4. Step 4: Simplify right side
    627,781.83x = 365,220,569,803.73
  5. Step 5: Solve for x
    x = 365,220,569,803.73/627,781.83
  6. Step 6: Final answer
    x = 581,763.52

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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.