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Finding the Fourth Proportional to 327,038.20, 490,630.20 and 256,179.40

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Solution

The fourth proportional to 327,038.20, 490,630.20 and 256,179.40 is: 384,326.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    327,038.20 : 490,630.20 = 256,179.40 : x
  2. Step 2: Convert to fraction form
    327,038.20/490,630.20 = 256,179.40/x
  3. Step 3: Cross multiply
    327,038.20x = 490,630.20 × 256,179.40
  4. Step 4: Simplify right side
    327,038.20x = 125,689,350,257.88
  5. Step 5: Solve for x
    x = 125,689,350,257.88/327,038.20
  6. Step 6: Final answer
    x = 384,326.20

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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.