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Finding the Fourth Proportional to 326.38, 449.25 and 279.70

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Solution

The fourth proportional to 326.38, 449.25 and 279.70 is: 385.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.38 : 449.25 = 279.70 : x
  2. Step 2: Convert to fraction form
    326.38/449.25 = 279.70/x
  3. Step 3: Cross multiply
    326.38x = 449.25 × 279.70
  4. Step 4: Simplify right side
    326.38x = 125,655.58
  5. Step 5: Solve for x
    x = 125,655.58/326.38
  6. Step 6: Final answer
    x = 385.00

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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.