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Finding the Fourth Proportional to 343.93, 515.18 and 161.48

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Solution

The fourth proportional to 343.93, 515.18 and 161.48 is: 241.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.93 : 515.18 = 161.48 : x
  2. Step 2: Convert to fraction form
    343.93/515.18 = 161.48/x
  3. Step 3: Cross multiply
    343.93x = 515.18 × 161.48
  4. Step 4: Simplify right side
    343.93x = 83,191.27
  5. Step 5: Solve for x
    x = 83,191.27/343.93
  6. Step 6: Final answer
    x = 241.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.