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Finding the Fourth Proportional to 248.88, 343.56 and 161.70

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Solution

The fourth proportional to 248.88, 343.56 and 161.70 is: 223.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.88 : 343.56 = 161.70 : x
  2. Step 2: Convert to fraction form
    248.88/343.56 = 161.70/x
  3. Step 3: Cross multiply
    248.88x = 343.56 × 161.70
  4. Step 4: Simplify right side
    248.88x = 55,553.65
  5. Step 5: Solve for x
    x = 55,553.65/248.88
  6. Step 6: Final answer
    x = 223.21

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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.