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Finding the Fourth Proportional to 1,236.92, 1,853.78 and 926.34

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Solution

The fourth proportional to 1,236.92, 1,853.78 and 926.34 is: 1,388.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,236.92 : 1,853.78 = 926.34 : x
  2. Step 2: Convert to fraction form
    1,236.92/1,853.78 = 926.34/x
  3. Step 3: Cross multiply
    1,236.92x = 1,853.78 × 926.34
  4. Step 4: Simplify right side
    1,236.92x = 1,717,221.30
  5. Step 5: Solve for x
    x = 1,717,221.30/1,236.92
  6. Step 6: Final answer
    x = 1,388.31

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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.