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Finding the Fourth Proportional to 311,392.62, 429,753.57 and 190,613.73

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Solution

The fourth proportional to 311,392.62, 429,753.57 and 190,613.73 is: 263,066.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,392.62 : 429,753.57 = 190,613.73 : x
  2. Step 2: Convert to fraction form
    311,392.62/429,753.57 = 190,613.73/x
  3. Step 3: Cross multiply
    311,392.62x = 429,753.57 × 190,613.73
  4. Step 4: Simplify right side
    311,392.62x = 81,916,930,958.52
  5. Step 5: Solve for x
    x = 81,916,930,958.52/311,392.62
  6. Step 6: Final answer
    x = 263,066.39

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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.