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Finding the Fourth Proportional to 324.64, 447.96 and 208.36

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Solution

The fourth proportional to 324.64, 447.96 and 208.36 is: 287.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.64 : 447.96 = 208.36 : x
  2. Step 2: Convert to fraction form
    324.64/447.96 = 208.36/x
  3. Step 3: Cross multiply
    324.64x = 447.96 × 208.36
  4. Step 4: Simplify right side
    324.64x = 93,336.95
  5. Step 5: Solve for x
    x = 93,336.95/324.64
  6. Step 6: Final answer
    x = 287.51

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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.