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Finding the Fourth Proportional to 326.89, 490.09 and 118.59

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Solution

The fourth proportional to 326.89, 490.09 and 118.59 is: 177.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.89 : 490.09 = 118.59 : x
  2. Step 2: Convert to fraction form
    326.89/490.09 = 118.59/x
  3. Step 3: Cross multiply
    326.89x = 490.09 × 118.59
  4. Step 4: Simplify right side
    326.89x = 58,119.77
  5. Step 5: Solve for x
    x = 58,119.77/326.89
  6. Step 6: Final answer
    x = 177.80

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Why These Related Problems?

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