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Finding the Fourth Proportional to 483,905.10, 725,857.65 and 168,138.75

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Solution

The fourth proportional to 483,905.10, 725,857.65 and 168,138.75 is: 252,208.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    483,905.10 : 725,857.65 = 168,138.75 : x
  2. Step 2: Convert to fraction form
    483,905.10/725,857.65 = 168,138.75/x
  3. Step 3: Cross multiply
    483,905.10x = 725,857.65 × 168,138.75
  4. Step 4: Simplify right side
    483,905.10x = 122,044,797,948.94
  5. Step 5: Solve for x
    x = 122,044,797,948.94/483,905.10
  6. Step 6: Final answer
    x = 252,208.13

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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.