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Finding the Fourth Proportional to 344.21, 516.47 and 161.55

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Solution

The fourth proportional to 344.21, 516.47 and 161.55 is: 242.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    344.21 : 516.47 = 161.55 : x
  2. Step 2: Convert to fraction form
    344.21/516.47 = 161.55/x
  3. Step 3: Cross multiply
    344.21x = 516.47 × 161.55
  4. Step 4: Simplify right side
    344.21x = 83,434.92
  5. Step 5: Solve for x
    x = 83,434.92/344.21
  6. Step 6: Final answer
    x = 242.40

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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.