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Finding the Fourth Proportional to 312,452.91, 431,227.94 and 191,572.83

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Solution

The fourth proportional to 312,452.91, 431,227.94 and 191,572.83 is: 264,396.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,452.91 : 431,227.94 = 191,572.83 : x
  2. Step 2: Convert to fraction form
    312,452.91/431,227.94 = 191,572.83/x
  3. Step 3: Cross multiply
    312,452.91x = 431,227.94 × 191,572.83
  4. Step 4: Simplify right side
    312,452.91x = 82,611,555,883.01
  5. Step 5: Solve for x
    x = 82,611,555,883.01/312,452.91
  6. Step 6: Final answer
    x = 264,396.82

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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.