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Finding the Fourth Proportional to 711.92, 1,067.59 and 218.17

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Solution

The fourth proportional to 711.92, 1,067.59 and 218.17 is: 327.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    711.92 : 1,067.59 = 218.17 : x
  2. Step 2: Convert to fraction form
    711.92/1,067.59 = 218.17/x
  3. Step 3: Cross multiply
    711.92x = 1,067.59 × 218.17
  4. Step 4: Simplify right side
    711.92x = 232,917.72
  5. Step 5: Solve for x
    x = 232,917.72/711.92
  6. Step 6: Final answer
    x = 327.17

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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.