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Finding the Fourth Proportional to 665.87, 998.77 and 254.97

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Solution

The fourth proportional to 665.87, 998.77 and 254.97 is: 382.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.87 : 998.77 = 254.97 : x
  2. Step 2: Convert to fraction form
    665.87/998.77 = 254.97/x
  3. Step 3: Cross multiply
    665.87x = 998.77 × 254.97
  4. Step 4: Simplify right side
    665.87x = 254,659.97
  5. Step 5: Solve for x
    x = 254,659.97/665.87
  6. Step 6: Final answer
    x = 382.45

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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.