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Finding the Fourth Proportional to 326.56, 451.20 and 282.88

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Solution

The fourth proportional to 326.56, 451.20 and 282.88 is: 390.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.56 : 451.20 = 282.88 : x
  2. Step 2: Convert to fraction form
    326.56/451.20 = 282.88/x
  3. Step 3: Cross multiply
    326.56x = 451.20 × 282.88
  4. Step 4: Simplify right side
    326.56x = 127,635.46
  5. Step 5: Solve for x
    x = 127,635.46/326.56
  6. Step 6: Final answer
    x = 390.85

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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.