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Finding the Fourth Proportional to 326.72, 490.49 and 259.08

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Solution

The fourth proportional to 326.72, 490.49 and 259.08 is: 388.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.72 : 490.49 = 259.08 : x
  2. Step 2: Convert to fraction form
    326.72/490.49 = 259.08/x
  3. Step 3: Cross multiply
    326.72x = 490.49 × 259.08
  4. Step 4: Simplify right side
    326.72x = 127,074.85
  5. Step 5: Solve for x
    x = 127,074.85/326.72
  6. Step 6: Final answer
    x = 388.95

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.