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Finding the Fourth Proportional to 326.96, 491.24 and 211.44

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Solution

The fourth proportional to 326.96, 491.24 and 211.44 is: 317.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.96 : 491.24 = 211.44 : x
  2. Step 2: Convert to fraction form
    326.96/491.24 = 211.44/x
  3. Step 3: Cross multiply
    326.96x = 491.24 × 211.44
  4. Step 4: Simplify right side
    326.96x = 103,867.79
  5. Step 5: Solve for x
    x = 103,867.79/326.96
  6. Step 6: Final answer
    x = 317.68

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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.