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Finding the Fourth Proportional to 312,234.78, 430,891.88 and 191,442.68

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Solution

The fourth proportional to 312,234.78, 430,891.88 and 191,442.68 is: 264,195.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,234.78 : 430,891.88 = 191,442.68 : x
  2. Step 2: Convert to fraction form
    312,234.78/430,891.88 = 191,442.68/x
  3. Step 3: Cross multiply
    312,234.78x = 430,891.88 × 191,442.68
  4. Step 4: Simplify right side
    312,234.78x = 82,491,093,185.77
  5. Step 5: Solve for x
    x = 82,491,093,185.77/312,234.78
  6. Step 6: Final answer
    x = 264,195.72

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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.