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Finding the Fourth Proportional to 824.26, 1,236.58 and 247.12

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Solution

The fourth proportional to 824.26, 1,236.58 and 247.12 is: 370.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    824.26 : 1,236.58 = 247.12 : x
  2. Step 2: Convert to fraction form
    824.26/1,236.58 = 247.12/x
  3. Step 3: Cross multiply
    824.26x = 1,236.58 × 247.12
  4. Step 4: Simplify right side
    824.26x = 305,583.65
  5. Step 5: Solve for x
    x = 305,583.65/824.26
  6. Step 6: Final answer
    x = 370.74

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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.