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Finding the Fourth Proportional to 326.71, 451.11 and 228.70

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Solution

The fourth proportional to 326.71, 451.11 and 228.70 is: 315.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.71 : 451.11 = 228.70 : x
  2. Step 2: Convert to fraction form
    326.71/451.11 = 228.70/x
  3. Step 3: Cross multiply
    326.71x = 451.11 × 228.70
  4. Step 4: Simplify right side
    326.71x = 103,168.86
  5. Step 5: Solve for x
    x = 103,168.86/326.71
  6. Step 6: Final answer
    x = 315.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.