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Finding the Fourth Proportional to 811.41, 1,217.13 and 234.27

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Solution

The fourth proportional to 811.41, 1,217.13 and 234.27 is: 351.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    811.41 : 1,217.13 = 234.27 : x
  2. Step 2: Convert to fraction form
    811.41/1,217.13 = 234.27/x
  3. Step 3: Cross multiply
    811.41x = 1,217.13 × 234.27
  4. Step 4: Simplify right side
    811.41x = 285,137.05
  5. Step 5: Solve for x
    x = 285,137.05/811.41
  6. Step 6: Final answer
    x = 351.41

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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.