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Finding the Fourth Proportional to 911.48, 1,367.39 and 326.66

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Solution

The fourth proportional to 911.48, 1,367.39 and 326.66 is: 490.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    911.48 : 1,367.39 = 326.66 : x
  2. Step 2: Convert to fraction form
    911.48/1,367.39 = 326.66/x
  3. Step 3: Cross multiply
    911.48x = 1,367.39 × 326.66
  4. Step 4: Simplify right side
    911.48x = 446,665.60
  5. Step 5: Solve for x
    x = 446,665.60/911.48
  6. Step 6: Final answer
    x = 490.05

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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.