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Finding the Fourth Proportional to 254.22, 381.03 and 145.79

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Solution

The fourth proportional to 254.22, 381.03 and 145.79 is: 218.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.22 : 381.03 = 145.79 : x
  2. Step 2: Convert to fraction form
    254.22/381.03 = 145.79/x
  3. Step 3: Cross multiply
    254.22x = 381.03 × 145.79
  4. Step 4: Simplify right side
    254.22x = 55,548.46
  5. Step 5: Solve for x
    x = 55,548.46/254.22
  6. Step 6: Final answer
    x = 218.51

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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.