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Finding the Fourth Proportional to 661,055.85, 991,584.11 and 436,363.77

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Solution

The fourth proportional to 661,055.85, 991,584.11 and 436,363.77 is: 654,545.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,055.85 : 991,584.11 = 436,363.77 : x
  2. Step 2: Convert to fraction form
    661,055.85/991,584.11 = 436,363.77/x
  3. Step 3: Cross multiply
    661,055.85x = 991,584.11 × 436,363.77
  4. Step 4: Simplify right side
    661,055.85x = 432,691,383,684.68
  5. Step 5: Solve for x
    x = 432,691,383,684.68/661,055.85
  6. Step 6: Final answer
    x = 654,545.88

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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.