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Finding the Fourth Proportional to 665.89, 998.26 and 254.95

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Solution

The fourth proportional to 665.89, 998.26 and 254.95 is: 382.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.89 : 998.26 = 254.95 : x
  2. Step 2: Convert to fraction form
    665.89/998.26 = 254.95/x
  3. Step 3: Cross multiply
    665.89x = 998.26 × 254.95
  4. Step 4: Simplify right side
    665.89x = 254,503.25
  5. Step 5: Solve for x
    x = 254,503.25/665.89
  6. Step 6: Final answer
    x = 382.20

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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.