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Finding the Fourth Proportional to 326.24, 449.89 and 279.77

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Solution

The fourth proportional to 326.24, 449.89 and 279.77 is: 385.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.24 : 449.89 = 279.77 : x
  2. Step 2: Convert to fraction form
    326.24/449.89 = 279.77/x
  3. Step 3: Cross multiply
    326.24x = 449.89 × 279.77
  4. Step 4: Simplify right side
    326.24x = 125,865.73
  5. Step 5: Solve for x
    x = 125,865.73/326.24
  6. Step 6: Final answer
    x = 385.81

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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.