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Finding the Fourth Proportional to 824.14, 1,236.21 and 231.13

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Solution

The fourth proportional to 824.14, 1,236.21 and 231.13 is: 346.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    824.14 : 1,236.21 = 231.13 : x
  2. Step 2: Convert to fraction form
    824.14/1,236.21 = 231.13/x
  3. Step 3: Cross multiply
    824.14x = 1,236.21 × 231.13
  4. Step 4: Simplify right side
    824.14x = 285,725.22
  5. Step 5: Solve for x
    x = 285,725.22/824.14
  6. Step 6: Final answer
    x = 346.70

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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.