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Finding the Fourth Proportional to 324.90, 447.66 and 272.25

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Solution

The fourth proportional to 324.90, 447.66 and 272.25 is: 375.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.90 : 447.66 = 272.25 : x
  2. Step 2: Convert to fraction form
    324.90/447.66 = 272.25/x
  3. Step 3: Cross multiply
    324.90x = 447.66 × 272.25
  4. Step 4: Simplify right side
    324.90x = 121,875.44
  5. Step 5: Solve for x
    x = 121,875.44/324.90
  6. Step 6: Final answer
    x = 375.12

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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.