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Finding the Fourth Proportional to 324.14, 486.38 and 187.31

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Solution

The fourth proportional to 324.14, 486.38 and 187.31 is: 281.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.14 : 486.38 = 187.31 : x
  2. Step 2: Convert to fraction form
    324.14/486.38 = 187.31/x
  3. Step 3: Cross multiply
    324.14x = 486.38 × 187.31
  4. Step 4: Simplify right side
    324.14x = 91,102.90
  5. Step 5: Solve for x
    x = 91,102.90/324.14
  6. Step 6: Final answer
    x = 281.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.