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Finding the Fourth Proportional to 1,168.54, 1,753.96 and 911.34

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Solution

The fourth proportional to 1,168.54, 1,753.96 and 911.34 is: 1,367.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,168.54 : 1,753.96 = 911.34 : x
  2. Step 2: Convert to fraction form
    1,168.54/1,753.96 = 911.34/x
  3. Step 3: Cross multiply
    1,168.54x = 1,753.96 × 911.34
  4. Step 4: Simplify right side
    1,168.54x = 1,598,453.91
  5. Step 5: Solve for x
    x = 1,598,453.91/1,168.54
  6. Step 6: Final answer
    x = 1,367.91

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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.