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Finding the Fourth Proportional to 327,087.60, 490,631.40 and 215,113.20

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Solution

The fourth proportional to 327,087.60, 490,631.40 and 215,113.20 is: 322,669.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    327,087.60 : 490,631.40 = 215,113.20 : x
  2. Step 2: Convert to fraction form
    327,087.60/490,631.40 = 215,113.20/x
  3. Step 3: Cross multiply
    327,087.60x = 490,631.40 × 215,113.20
  4. Step 4: Simplify right side
    327,087.60x = 105,541,290,474.48
  5. Step 5: Solve for x
    x = 105,541,290,474.48/327,087.60
  6. Step 6: Final answer
    x = 322,669.80

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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.