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Finding the Fourth Proportional to 1,238.49, 1,857.02 and 1,092.56

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Solution

The fourth proportional to 1,238.49, 1,857.02 and 1,092.56 is: 1,638.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,238.49 : 1,857.02 = 1,092.56 : x
  2. Step 2: Convert to fraction form
    1,238.49/1,857.02 = 1,092.56/x
  3. Step 3: Cross multiply
    1,238.49x = 1,857.02 × 1,092.56
  4. Step 4: Simplify right side
    1,238.49x = 2,028,891.02
  5. Step 5: Solve for x
    x = 2,028,891.02/1,238.49
  6. Step 6: Final answer
    x = 1,638.20

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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.