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Finding the Fourth Proportional to 344.34, 516.60 and 212.72

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Solution

The fourth proportional to 344.34, 516.60 and 212.72 is: 319.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    344.34 : 516.60 = 212.72 : x
  2. Step 2: Convert to fraction form
    344.34/516.60 = 212.72/x
  3. Step 3: Cross multiply
    344.34x = 516.60 × 212.72
  4. Step 4: Simplify right side
    344.34x = 109,888.57
  5. Step 5: Solve for x
    x = 109,888.57/344.34
  6. Step 6: Final answer
    x = 319.13

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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.