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Finding the Fourth Proportional to 393,221.92, 589,735.17 and 168,556.87

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Solution

The fourth proportional to 393,221.92, 589,735.17 and 168,556.87 is: 252,793.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,221.92 : 589,735.17 = 168,556.87 : x
  2. Step 2: Convert to fraction form
    393,221.92/589,735.17 = 168,556.87/x
  3. Step 3: Cross multiply
    393,221.92x = 589,735.17 × 168,556.87
  4. Step 4: Simplify right side
    393,221.92x = 99,403,914,384.12
  5. Step 5: Solve for x
    x = 99,403,914,384.12/393,221.92
  6. Step 6: Final answer
    x = 252,793.42

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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.