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Finding the Fourth Proportional to 248.72, 343.26 and 161.64

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Solution

The fourth proportional to 248.72, 343.26 and 161.64 is: 223.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.72 : 343.26 = 161.64 : x
  2. Step 2: Convert to fraction form
    248.72/343.26 = 161.64/x
  3. Step 3: Cross multiply
    248.72x = 343.26 × 161.64
  4. Step 4: Simplify right side
    248.72x = 55,484.55
  5. Step 5: Solve for x
    x = 55,484.55/248.72
  6. Step 6: Final answer
    x = 223.08

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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.