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Finding the Fourth Proportional to 248.66, 344.02 and 239.66

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Solution

The fourth proportional to 248.66, 344.02 and 239.66 is: 331.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.66 : 344.02 = 239.66 : x
  2. Step 2: Convert to fraction form
    248.66/344.02 = 239.66/x
  3. Step 3: Cross multiply
    248.66x = 344.02 × 239.66
  4. Step 4: Simplify right side
    248.66x = 82,447.83
  5. Step 5: Solve for x
    x = 82,447.83/248.66
  6. Step 6: Final answer
    x = 331.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.