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Finding the Fourth Proportional to 644.94, 966.96 and 254.66

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Solution

The fourth proportional to 644.94, 966.96 and 254.66 is: 381.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.94 : 966.96 = 254.66 : x
  2. Step 2: Convert to fraction form
    644.94/966.96 = 254.66/x
  3. Step 3: Cross multiply
    644.94x = 966.96 × 254.66
  4. Step 4: Simplify right side
    644.94x = 246,241.20
  5. Step 5: Solve for x
    x = 246,241.20/644.94
  6. Step 6: Final answer
    x = 381.80

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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.