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Finding the Fourth Proportional to 326.39, 450.63 and 256.73

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Solution

The fourth proportional to 326.39, 450.63 and 256.73 is: 354.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.39 : 450.63 = 256.73 : x
  2. Step 2: Convert to fraction form
    326.39/450.63 = 256.73/x
  3. Step 3: Cross multiply
    326.39x = 450.63 × 256.73
  4. Step 4: Simplify right side
    326.39x = 115,687.99
  5. Step 5: Solve for x
    x = 115,687.99/326.39
  6. Step 6: Final answer
    x = 354.45

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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.