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Finding the Fourth Proportional to 2,623.78, 3,935.70 and 892.54

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Solution

The fourth proportional to 2,623.78, 3,935.70 and 892.54 is: 1,338.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,623.78 : 3,935.70 = 892.54 : x
  2. Step 2: Convert to fraction form
    2,623.78/3,935.70 = 892.54/x
  3. Step 3: Cross multiply
    2,623.78x = 3,935.70 × 892.54
  4. Step 4: Simplify right side
    2,623.78x = 3,512,769.68
  5. Step 5: Solve for x
    x = 3,512,769.68/2,623.78
  6. Step 6: Final answer
    x = 1,338.82

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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.