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Finding the Fourth Proportional to 711.72, 1,067.82 and 327.24

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Solution

The fourth proportional to 711.72, 1,067.82 and 327.24 is: 490.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    711.72 : 1,067.82 = 327.24 : x
  2. Step 2: Convert to fraction form
    711.72/1,067.82 = 327.24/x
  3. Step 3: Cross multiply
    711.72x = 1,067.82 × 327.24
  4. Step 4: Simplify right side
    711.72x = 349,433.42
  5. Step 5: Solve for x
    x = 349,433.42/711.72
  6. Step 6: Final answer
    x = 490.97

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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.