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Finding the Fourth Proportional to 911.90, 1,250.21 and 895.49

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Solution

The fourth proportional to 911.90, 1,250.21 and 895.49 is: 1,227.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    911.90 : 1,250.21 = 895.49 : x
  2. Step 2: Convert to fraction form
    911.90/1,250.21 = 895.49/x
  3. Step 3: Cross multiply
    911.90x = 1,250.21 × 895.49
  4. Step 4: Simplify right side
    911.90x = 1,119,539.82
  5. Step 5: Solve for x
    x = 1,119,539.82/911.90
  6. Step 6: Final answer
    x = 1,227.71

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.