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Finding the Fourth Proportional to 344.42, 516.47 and 127.84

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Solution

The fourth proportional to 344.42, 516.47 and 127.84 is: 191.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    344.42 : 516.47 = 127.84 : x
  2. Step 2: Convert to fraction form
    344.42/516.47 = 127.84/x
  3. Step 3: Cross multiply
    344.42x = 516.47 × 127.84
  4. Step 4: Simplify right side
    344.42x = 66,025.52
  5. Step 5: Solve for x
    x = 66,025.52/344.42
  6. Step 6: Final answer
    x = 191.70

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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.