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Finding the Fourth Proportional to 343.98, 516.17 and 127.55

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Solution

The fourth proportional to 343.98, 516.17 and 127.55 is: 191.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.98 : 516.17 = 127.55 : x
  2. Step 2: Convert to fraction form
    343.98/516.17 = 127.55/x
  3. Step 3: Cross multiply
    343.98x = 516.17 × 127.55
  4. Step 4: Simplify right side
    343.98x = 65,839.09
  5. Step 5: Solve for x
    x = 65,839.09/343.98
  6. Step 6: Final answer
    x = 191.40

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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.