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Finding the Fourth Proportional to 911.96, 1,367.96 and 885.33

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Solution

The fourth proportional to 911.96, 1,367.96 and 885.33 is: 1,328.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    911.96 : 1,367.96 = 885.33 : x
  2. Step 2: Convert to fraction form
    911.96/1,367.96 = 885.33/x
  3. Step 3: Cross multiply
    911.96x = 1,367.96 × 885.33
  4. Step 4: Simplify right side
    911.96x = 1,211,091.60
  5. Step 5: Solve for x
    x = 1,211,091.60/911.96
  6. Step 6: Final answer
    x = 1,328.01

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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.