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Finding the Fourth Proportional to 824.11, 1,236.75 and 330.23

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Solution

The fourth proportional to 824.11, 1,236.75 and 330.23 is: 495.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    824.11 : 1,236.75 = 330.23 : x
  2. Step 2: Convert to fraction form
    824.11/1,236.75 = 330.23/x
  3. Step 3: Cross multiply
    824.11x = 1,236.75 × 330.23
  4. Step 4: Simplify right side
    824.11x = 408,415.66
  5. Step 5: Solve for x
    x = 408,415.66/824.11
  6. Step 6: Final answer
    x = 495.59

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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.