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Finding the Fourth Proportional to 324.48, 447.72 and 275.28

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Solution

The fourth proportional to 324.48, 447.72 and 275.28 is: 379.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.48 : 447.72 = 275.28 : x
  2. Step 2: Convert to fraction form
    324.48/447.72 = 275.28/x
  3. Step 3: Cross multiply
    324.48x = 447.72 × 275.28
  4. Step 4: Simplify right side
    324.48x = 123,248.36
  5. Step 5: Solve for x
    x = 123,248.36/324.48
  6. Step 6: Final answer
    x = 379.83

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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.