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Finding the Fourth Proportional to 247.24, 369.28 and 206.69

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Solution

The fourth proportional to 247.24, 369.28 and 206.69 is: 308.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.24 : 369.28 = 206.69 : x
  2. Step 2: Convert to fraction form
    247.24/369.28 = 206.69/x
  3. Step 3: Cross multiply
    247.24x = 369.28 × 206.69
  4. Step 4: Simplify right side
    247.24x = 76,326.48
  5. Step 5: Solve for x
    x = 76,326.48/247.24
  6. Step 6: Final answer
    x = 308.71

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.