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Finding the Fourth Proportional to 283,639.78, 391,354.15 and 161,104.89

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Solution

The fourth proportional to 283,639.78, 391,354.15 and 161,104.89 is: 222,285.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,639.78 : 391,354.15 = 161,104.89 : x
  2. Step 2: Convert to fraction form
    283,639.78/391,354.15 = 161,104.89/x
  3. Step 3: Cross multiply
    283,639.78x = 391,354.15 × 161,104.89
  4. Step 4: Simplify right side
    283,639.78x = 63,049,066,481.27
  5. Step 5: Solve for x
    x = 63,049,066,481.27/283,639.78
  6. Step 6: Final answer
    x = 222,285.70

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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.