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Finding the Fourth Proportional to 327,078.60, 490,617.90 and 215,104.20

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Solution

The fourth proportional to 327,078.60, 490,617.90 and 215,104.20 is: 322,656.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    327,078.60 : 490,617.90 = 215,104.20 : x
  2. Step 2: Convert to fraction form
    327,078.60/490,617.90 = 215,104.20/x
  3. Step 3: Cross multiply
    327,078.60x = 490,617.90 × 215,104.20
  4. Step 4: Simplify right side
    327,078.60x = 105,533,970,885.18
  5. Step 5: Solve for x
    x = 105,533,970,885.18/327,078.60
  6. Step 6: Final answer
    x = 322,656.30

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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.