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Finding the Fourth Proportional to 893.18, 1,240.85 and 885.17

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Solution

The fourth proportional to 893.18, 1,240.85 and 885.17 is: 1,229.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    893.18 : 1,240.85 = 885.17 : x
  2. Step 2: Convert to fraction form
    893.18/1,240.85 = 885.17/x
  3. Step 3: Cross multiply
    893.18x = 1,240.85 × 885.17
  4. Step 4: Simplify right side
    893.18x = 1,098,352.56
  5. Step 5: Solve for x
    x = 1,098,352.56/893.18
  6. Step 6: Final answer
    x = 1,229.72

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.