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Finding the Fourth Proportional to 327,880.40, 491,723.40 and 128,085.80

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Solution

The fourth proportional to 327,880.40, 491,723.40 and 128,085.80 is: 192,090.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    327,880.40 : 491,723.40 = 128,085.80 : x
  2. Step 2: Convert to fraction form
    327,880.40/491,723.40 = 128,085.80/x
  3. Step 3: Cross multiply
    327,880.40x = 491,723.40 × 128,085.80
  4. Step 4: Simplify right side
    327,880.40x = 62,982,785,067.72
  5. Step 5: Solve for x
    x = 62,982,785,067.72/327,880.40
  6. Step 6: Final answer
    x = 192,090.73

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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.