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Finding the Fourth Proportional to 620.38, 929.78 and 254.73

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Solution

The fourth proportional to 620.38, 929.78 and 254.73 is: 381.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.38 : 929.78 = 254.73 : x
  2. Step 2: Convert to fraction form
    620.38/929.78 = 254.73/x
  3. Step 3: Cross multiply
    620.38x = 929.78 × 254.73
  4. Step 4: Simplify right side
    620.38x = 236,846.03
  5. Step 5: Solve for x
    x = 236,846.03/620.38
  6. Step 6: Final answer
    x = 381.77

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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.