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Finding the Fourth Proportional to 248.36, 344.39 and 243.90

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Solution

The fourth proportional to 248.36, 344.39 and 243.90 is: 338.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.36 : 344.39 = 243.90 : x
  2. Step 2: Convert to fraction form
    248.36/344.39 = 243.90/x
  3. Step 3: Cross multiply
    248.36x = 344.39 × 243.90
  4. Step 4: Simplify right side
    248.36x = 83,995.50
  5. Step 5: Solve for x
    x = 83,995.50/248.36
  6. Step 6: Final answer
    x = 338.21

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.