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Finding the Fourth Proportional to 451.38, 622.86 and 254.93

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Solution

The fourth proportional to 451.38, 622.86 and 254.93 is: 351.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.38 : 622.86 = 254.93 : x
  2. Step 2: Convert to fraction form
    451.38/622.86 = 254.93/x
  3. Step 3: Cross multiply
    451.38x = 622.86 × 254.93
  4. Step 4: Simplify right side
    451.38x = 158,785.70
  5. Step 5: Solve for x
    x = 158,785.70/451.38
  6. Step 6: Final answer
    x = 351.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.