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Finding the Fourth Proportional to 326.99, 451.27 and 228.71

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Solution

The fourth proportional to 326.99, 451.27 and 228.71 is: 315.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.99 : 451.27 = 228.71 : x
  2. Step 2: Convert to fraction form
    326.99/451.27 = 228.71/x
  3. Step 3: Cross multiply
    326.99x = 451.27 × 228.71
  4. Step 4: Simplify right side
    326.99x = 103,211.38
  5. Step 5: Solve for x
    x = 103,211.38/326.99
  6. Step 6: Final answer
    x = 315.64

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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.