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Finding the Fourth Proportional to 327,721, 491,608.17 and 91,063.69

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Solution

The fourth proportional to 327,721, 491,608.17 and 91,063.69 is: 136,602.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    327,721 : 491,608.17 = 91,063.69 : x
  2. Step 2: Convert to fraction form
    327,721/491,608.17 = 91,063.69/x
  3. Step 3: Cross multiply
    327,721x = 491,608.17 × 91,063.69
  4. Step 4: Simplify right side
    327,721x = 44,767,653,994.35
  5. Step 5: Solve for x
    x = 44,767,653,994.35/327,721
  6. Step 6: Final answer
    x = 136,602.95

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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.