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Finding the Fourth Proportional to 327,718.74, 491,604.79 and 91,061.45

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Solution

The fourth proportional to 327,718.74, 491,604.79 and 91,061.45 is: 136,599.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    327,718.74 : 491,604.79 = 91,061.45 : x
  2. Step 2: Convert to fraction form
    327,718.74/491,604.79 = 91,061.45/x
  3. Step 3: Cross multiply
    327,718.74x = 491,604.79 × 91,061.45
  4. Step 4: Simplify right side
    327,718.74x = 44,766,245,004.35
  5. Step 5: Solve for x
    x = 44,766,245,004.35/327,718.74
  6. Step 6: Final answer
    x = 136,599.59

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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.