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Finding the Fourth Proportional to 824.48, 1,236.60 and 247.28

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Solution

The fourth proportional to 824.48, 1,236.60 and 247.28 is: 370.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    824.48 : 1,236.60 = 247.28 : x
  2. Step 2: Convert to fraction form
    824.48/1,236.60 = 247.28/x
  3. Step 3: Cross multiply
    824.48x = 1,236.60 × 247.28
  4. Step 4: Simplify right side
    824.48x = 305,786.45
  5. Step 5: Solve for x
    x = 305,786.45/824.48
  6. Step 6: Final answer
    x = 370.88

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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.