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Finding the Fourth Proportional to 239,876, 330,721.20 and 196,696.48

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Solution

The fourth proportional to 239,876, 330,721.20 and 196,696.48 is: 271,188.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,876 : 330,721.20 = 196,696.48 : x
  2. Step 2: Convert to fraction form
    239,876/330,721.20 = 196,696.48/x
  3. Step 3: Cross multiply
    239,876x = 330,721.20 × 196,696.48
  4. Step 4: Simplify right side
    239,876x = 65,051,695,901.38
  5. Step 5: Solve for x
    x = 65,051,695,901.38/239,876
  6. Step 6: Final answer
    x = 271,188.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.