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Finding the Fourth Proportional to 665.17, 997.90 and 232.31

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Solution

The fourth proportional to 665.17, 997.90 and 232.31 is: 348.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.17 : 997.90 = 232.31 : x
  2. Step 2: Convert to fraction form
    665.17/997.90 = 232.31/x
  3. Step 3: Cross multiply
    665.17x = 997.90 × 232.31
  4. Step 4: Simplify right side
    665.17x = 231,824.06
  5. Step 5: Solve for x
    x = 231,824.06/665.17
  6. Step 6: Final answer
    x = 348.52

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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.