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Finding the Fourth Proportional to 349.63, 523.88 and 212.72

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Solution

The fourth proportional to 349.63, 523.88 and 212.72 is: 318.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.63 : 523.88 = 212.72 : x
  2. Step 2: Convert to fraction form
    349.63/523.88 = 212.72/x
  3. Step 3: Cross multiply
    349.63x = 523.88 × 212.72
  4. Step 4: Simplify right side
    349.63x = 111,437.91
  5. Step 5: Solve for x
    x = 111,437.91/349.63
  6. Step 6: Final answer
    x = 318.73

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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.