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Finding the Fourth Proportional to 326.10, 450.45 and 318.18

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Solution

The fourth proportional to 326.10, 450.45 and 318.18 is: 439.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.10 : 450.45 = 318.18 : x
  2. Step 2: Convert to fraction form
    326.10/450.45 = 318.18/x
  3. Step 3: Cross multiply
    326.10x = 450.45 × 318.18
  4. Step 4: Simplify right side
    326.10x = 143,324.18
  5. Step 5: Solve for x
    x = 143,324.18/326.10
  6. Step 6: Final answer
    x = 439.51

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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.