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Finding the Fourth Proportional to 254.52, 381.78 and 190.26

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Solution

The fourth proportional to 254.52, 381.78 and 190.26 is: 285.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.52 : 381.78 = 190.26 : x
  2. Step 2: Convert to fraction form
    254.52/381.78 = 190.26/x
  3. Step 3: Cross multiply
    254.52x = 381.78 × 190.26
  4. Step 4: Simplify right side
    254.52x = 72,637.46
  5. Step 5: Solve for x
    x = 72,637.46/254.52
  6. Step 6: Final answer
    x = 285.39

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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.