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Finding the Fourth Proportional to 254.54, 381.97 and 214.45

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Solution

The fourth proportional to 254.54, 381.97 and 214.45 is: 321.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.54 : 381.97 = 214.45 : x
  2. Step 2: Convert to fraction form
    254.54/381.97 = 214.45/x
  3. Step 3: Cross multiply
    254.54x = 381.97 × 214.45
  4. Step 4: Simplify right side
    254.54x = 81,911.57
  5. Step 5: Solve for x
    x = 81,911.57/254.54
  6. Step 6: Final answer
    x = 321.80

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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.