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Finding the Fourth Proportional to 312,191.11, 430,531.30 and 207,229.39

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Solution

The fourth proportional to 312,191.11, 430,531.30 and 207,229.39 is: 285,782.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,191.11 : 430,531.30 = 207,229.39 : x
  2. Step 2: Convert to fraction form
    312,191.11/430,531.30 = 207,229.39/x
  3. Step 3: Cross multiply
    312,191.11x = 430,531.30 × 207,229.39
  4. Step 4: Simplify right side
    312,191.11x = 89,218,737,857.62
  5. Step 5: Solve for x
    x = 89,218,737,857.62/312,191.11
  6. Step 6: Final answer
    x = 285,782.44

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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.