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Finding the Fourth Proportional to 1,231.57, 1,838.17 and 1,133.92

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Solution

The fourth proportional to 1,231.57, 1,838.17 and 1,133.92 is: 1,692.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,231.57 : 1,838.17 = 1,133.92 : x
  2. Step 2: Convert to fraction form
    1,231.57/1,838.17 = 1,133.92/x
  3. Step 3: Cross multiply
    1,231.57x = 1,838.17 × 1,133.92
  4. Step 4: Simplify right side
    1,231.57x = 2,084,337.73
  5. Step 5: Solve for x
    x = 2,084,337.73/1,231.57
  6. Step 6: Final answer
    x = 1,692.42

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.