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Finding the Fourth Proportional to 451.38, 677.01 and 231.78

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Solution

The fourth proportional to 451.38, 677.01 and 231.78 is: 347.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.38 : 677.01 = 231.78 : x
  2. Step 2: Convert to fraction form
    451.38/677.01 = 231.78/x
  3. Step 3: Cross multiply
    451.38x = 677.01 × 231.78
  4. Step 4: Simplify right side
    451.38x = 156,917.38
  5. Step 5: Solve for x
    x = 156,917.38/451.38
  6. Step 6: Final answer
    x = 347.64

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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.