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Finding the Fourth Proportional to 612,185.27, 915,591.99 and 545,189.76

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Solution

The fourth proportional to 612,185.27, 915,591.99 and 545,189.76 is: 815,392.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,185.27 : 915,591.99 = 545,189.76 : x
  2. Step 2: Convert to fraction form
    612,185.27/915,591.99 = 545,189.76/x
  3. Step 3: Cross multiply
    612,185.27x = 915,591.99 × 545,189.76
  4. Step 4: Simplify right side
    612,185.27x = 499,171,377,286.02
  5. Step 5: Solve for x
    x = 499,171,377,286.02/612,185.27
  6. Step 6: Final answer
    x = 815,392.66

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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.