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Finding the Fourth Proportional to 326.54, 451.18 and 256.75

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Solution

The fourth proportional to 326.54, 451.18 and 256.75 is: 354.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.54 : 451.18 = 256.75 : x
  2. Step 2: Convert to fraction form
    326.54/451.18 = 256.75/x
  3. Step 3: Cross multiply
    326.54x = 451.18 × 256.75
  4. Step 4: Simplify right side
    326.54x = 115,838.70
  5. Step 5: Solve for x
    x = 115,838.70/326.54
  6. Step 6: Final answer
    x = 354.74

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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.