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Finding the Fourth Proportional to 611.98, 917.97 and 179.17

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Solution

The fourth proportional to 611.98, 917.97 and 179.17 is: 268.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.98 : 917.97 = 179.17 : x
  2. Step 2: Convert to fraction form
    611.98/917.97 = 179.17/x
  3. Step 3: Cross multiply
    611.98x = 917.97 × 179.17
  4. Step 4: Simplify right side
    611.98x = 164,472.68
  5. Step 5: Solve for x
    x = 164,472.68/611.98
  6. Step 6: Final answer
    x = 268.76

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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.