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Finding the Fourth Proportional to 324.31, 447.40 and 235.58

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Solution

The fourth proportional to 324.31, 447.40 and 235.58 is: 324.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.31 : 447.40 = 235.58 : x
  2. Step 2: Convert to fraction form
    324.31/447.40 = 235.58/x
  3. Step 3: Cross multiply
    324.31x = 447.40 × 235.58
  4. Step 4: Simplify right side
    324.31x = 105,398.32
  5. Step 5: Solve for x
    x = 105,398.32/324.31
  6. Step 6: Final answer
    x = 324.99

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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.