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Finding the Fourth Proportional to 326.86, 451.32 and 216.49

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Solution

The fourth proportional to 326.86, 451.32 and 216.49 is: 298.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.86 : 451.32 = 216.49 : x
  2. Step 2: Convert to fraction form
    326.86/451.32 = 216.49/x
  3. Step 3: Cross multiply
    326.86x = 451.32 × 216.49
  4. Step 4: Simplify right side
    326.86x = 97,702.93
  5. Step 5: Solve for x
    x = 97,702.93/326.86
  6. Step 6: Final answer
    x = 298.92

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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.