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Finding the Fourth Proportional to 327,969.42, 491,640.39 and 128,223.42

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Solution

The fourth proportional to 327,969.42, 491,640.39 and 128,223.42 is: 192,212.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    327,969.42 : 491,640.39 = 128,223.42 : x
  2. Step 2: Convert to fraction form
    327,969.42/491,640.39 = 128,223.42/x
  3. Step 3: Cross multiply
    327,969.42x = 491,640.39 × 128,223.42
  4. Step 4: Simplify right side
    327,969.42x = 63,039,812,215.93
  5. Step 5: Solve for x
    x = 63,039,812,215.93/327,969.42
  6. Step 6: Final answer
    x = 192,212.47

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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.