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Finding the Fourth Proportional to 521,942.78, 782,914.17 and 127,958.78

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Solution

The fourth proportional to 521,942.78, 782,914.17 and 127,958.78 is: 191,938.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,942.78 : 782,914.17 = 127,958.78 : x
  2. Step 2: Convert to fraction form
    521,942.78/782,914.17 = 127,958.78/x
  3. Step 3: Cross multiply
    521,942.78x = 782,914.17 × 127,958.78
  4. Step 4: Simplify right side
    521,942.78x = 100,180,742,037.91
  5. Step 5: Solve for x
    x = 100,180,742,037.91/521,942.78
  6. Step 6: Final answer
    x = 191,938.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.