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Finding the Fourth Proportional to 395.45, 593.24 and 212.79

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Solution

The fourth proportional to 395.45, 593.24 and 212.79 is: 319.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.45 : 593.24 = 212.79 : x
  2. Step 2: Convert to fraction form
    395.45/593.24 = 212.79/x
  3. Step 3: Cross multiply
    395.45x = 593.24 × 212.79
  4. Step 4: Simplify right side
    395.45x = 126,234.48
  5. Step 5: Solve for x
    x = 126,234.48/395.45
  6. Step 6: Final answer
    x = 319.22

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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.