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Finding the Fourth Proportional to 324.22, 485.91 and 141.56

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Solution

The fourth proportional to 324.22, 485.91 and 141.56 is: 212.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.22 : 485.91 = 141.56 : x
  2. Step 2: Convert to fraction form
    324.22/485.91 = 141.56/x
  3. Step 3: Cross multiply
    324.22x = 485.91 × 141.56
  4. Step 4: Simplify right side
    324.22x = 68,785.42
  5. Step 5: Solve for x
    x = 68,785.42/324.22
  6. Step 6: Final answer
    x = 212.16

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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.