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Finding the Fourth Proportional to 326.80, 451.61 and 316.14

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Solution

The fourth proportional to 326.80, 451.61 and 316.14 is: 436.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.80 : 451.61 = 316.14 : x
  2. Step 2: Convert to fraction form
    326.80/451.61 = 316.14/x
  3. Step 3: Cross multiply
    326.80x = 451.61 × 316.14
  4. Step 4: Simplify right side
    326.80x = 142,771.99
  5. Step 5: Solve for x
    x = 142,771.99/326.80
  6. Step 6: Final answer
    x = 436.88

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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.