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Finding the Fourth Proportional to 324.51, 447.31 and 219.57

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Solution

The fourth proportional to 324.51, 447.31 and 219.57 is: 302.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.51 : 447.31 = 219.57 : x
  2. Step 2: Convert to fraction form
    324.51/447.31 = 219.57/x
  3. Step 3: Cross multiply
    324.51x = 447.31 × 219.57
  4. Step 4: Simplify right side
    324.51x = 98,215.86
  5. Step 5: Solve for x
    x = 98,215.86/324.51
  6. Step 6: Final answer
    x = 302.66

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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.