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Finding the Fourth Proportional to 666.24, 998.67 and 255.12

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Solution

The fourth proportional to 666.24, 998.67 and 255.12 is: 382.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.24 : 998.67 = 255.12 : x
  2. Step 2: Convert to fraction form
    666.24/998.67 = 255.12/x
  3. Step 3: Cross multiply
    666.24x = 998.67 × 255.12
  4. Step 4: Simplify right side
    666.24x = 254,780.69
  5. Step 5: Solve for x
    x = 254,780.69/666.24
  6. Step 6: Final answer
    x = 382.42

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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.