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Finding the Fourth Proportional to 331.91, 458.16 and 192.09

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Solution

The fourth proportional to 331.91, 458.16 and 192.09 is: 265.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.91 : 458.16 = 192.09 : x
  2. Step 2: Convert to fraction form
    331.91/458.16 = 192.09/x
  3. Step 3: Cross multiply
    331.91x = 458.16 × 192.09
  4. Step 4: Simplify right side
    331.91x = 88,009.40
  5. Step 5: Solve for x
    x = 88,009.40/331.91
  6. Step 6: Final answer
    x = 265.16

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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.