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Finding the Fourth Proportional to 324.13, 486.19 and 118.61

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Solution

The fourth proportional to 324.13, 486.19 and 118.61 is: 177.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.13 : 486.19 = 118.61 : x
  2. Step 2: Convert to fraction form
    324.13/486.19 = 118.61/x
  3. Step 3: Cross multiply
    324.13x = 486.19 × 118.61
  4. Step 4: Simplify right side
    324.13x = 57,665.62
  5. Step 5: Solve for x
    x = 57,665.62/324.13
  6. Step 6: Final answer
    x = 177.91

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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.