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Finding the Fourth Proportional to 327,028.20, 490,615.20 and 256,169.40

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Solution

The fourth proportional to 327,028.20, 490,615.20 and 256,169.40 is: 384,311.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    327,028.20 : 490,615.20 = 256,169.40 : x
  2. Step 2: Convert to fraction form
    327,028.20/490,615.20 = 256,169.40/x
  3. Step 3: Cross multiply
    327,028.20x = 490,615.20 × 256,169.40
  4. Step 4: Simplify right side
    327,028.20x = 125,680,601,414.88
  5. Step 5: Solve for x
    x = 125,680,601,414.88/327,028.20
  6. Step 6: Final answer
    x = 384,311.20

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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.