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Finding the Fourth Proportional to 327,388.40, 490,391.40 and 272,092.40

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Solution

The fourth proportional to 327,388.40, 490,391.40 and 272,092.40 is: 407,564.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    327,388.40 : 490,391.40 = 272,092.40 : x
  2. Step 2: Convert to fraction form
    327,388.40/490,391.40 = 272,092.40/x
  3. Step 3: Cross multiply
    327,388.40x = 490,391.40 × 272,092.40
  4. Step 4: Simplify right side
    327,388.40x = 133,431,772,965.36
  5. Step 5: Solve for x
    x = 133,431,772,965.36/327,388.40
  6. Step 6: Final answer
    x = 407,564.14

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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.