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Finding the Fourth Proportional to 661,321.70, 991,983.09 and 529,042.83

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Solution

The fourth proportional to 661,321.70, 991,983.09 and 529,042.83 is: 793,564.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,321.70 : 991,983.09 = 529,042.83 : x
  2. Step 2: Convert to fraction form
    661,321.70/991,983.09 = 529,042.83/x
  3. Step 3: Cross multiply
    661,321.70x = 991,983.09 × 529,042.83
  4. Step 4: Simplify right side
    661,321.70x = 524,801,541,245.75
  5. Step 5: Solve for x
    x = 524,801,541,245.75/661,321.70
  6. Step 6: Final answer
    x = 793,564.68

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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.