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Finding the Fourth Proportional to 327,626.24, 491,128 and 128,074.56

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Solution

The fourth proportional to 327,626.24, 491,128 and 128,074.56 is: 191,990.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    327,626.24 : 491,128 = 128,074.56 : x
  2. Step 2: Convert to fraction form
    327,626.24/491,128 = 128,074.56/x
  3. Step 3: Cross multiply
    327,626.24x = 491,128 × 128,074.56
  4. Step 4: Simplify right side
    327,626.24x = 62,901,002,503.68
  5. Step 5: Solve for x
    x = 62,901,002,503.68/327,626.24
  6. Step 6: Final answer
    x = 191,990.12

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1.5x scale

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.