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Finding the Fourth Proportional to 665.67, 998.36 and 254.66

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Solution

The fourth proportional to 665.67, 998.36 and 254.66 is: 381.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.67 : 998.36 = 254.66 : x
  2. Step 2: Convert to fraction form
    665.67/998.36 = 254.66/x
  3. Step 3: Cross multiply
    665.67x = 998.36 × 254.66
  4. Step 4: Simplify right side
    665.67x = 254,245.49
  5. Step 5: Solve for x
    x = 254,245.49/665.67
  6. Step 6: Final answer
    x = 381.94

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