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Finding the Fourth Proportional to 326.72, 450.69 and 216.16

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Solution

The fourth proportional to 326.72, 450.69 and 216.16 is: 298.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.72 : 450.69 = 216.16 : x
  2. Step 2: Convert to fraction form
    326.72/450.69 = 216.16/x
  3. Step 3: Cross multiply
    326.72x = 450.69 × 216.16
  4. Step 4: Simplify right side
    326.72x = 97,421.15
  5. Step 5: Solve for x
    x = 97,421.15/326.72
  6. Step 6: Final answer
    x = 298.18

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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.