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Finding the Fourth Proportional to 219.71, 329.75 and 117.09

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Solution

The fourth proportional to 219.71, 329.75 and 117.09 is: 175.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.71 : 329.75 = 117.09 : x
  2. Step 2: Convert to fraction form
    219.71/329.75 = 117.09/x
  3. Step 3: Cross multiply
    219.71x = 329.75 × 117.09
  4. Step 4: Simplify right side
    219.71x = 38,609.84
  5. Step 5: Solve for x
    x = 38,609.84/219.71
  6. Step 6: Final answer
    x = 175.73

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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.