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Finding the Fourth Proportional to 254.31, 381.10 and 202.72

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Solution

The fourth proportional to 254.31, 381.10 and 202.72 is: 303.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.31 : 381.10 = 202.72 : x
  2. Step 2: Convert to fraction form
    254.31/381.10 = 202.72/x
  3. Step 3: Cross multiply
    254.31x = 381.10 × 202.72
  4. Step 4: Simplify right side
    254.31x = 77,256.59
  5. Step 5: Solve for x
    x = 77,256.59/254.31
  6. Step 6: Final answer
    x = 303.79

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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.