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Finding the Fourth Proportional to 395.51, 593.06 and 212.72

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Solution

The fourth proportional to 395.51, 593.06 and 212.72 is: 318.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.51 : 593.06 = 212.72 : x
  2. Step 2: Convert to fraction form
    395.51/593.06 = 212.72/x
  3. Step 3: Cross multiply
    395.51x = 593.06 × 212.72
  4. Step 4: Simplify right side
    395.51x = 126,151.69
  5. Step 5: Solve for x
    x = 126,151.69/395.51
  6. Step 6: Final answer
    x = 318.96

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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.