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Finding the Fourth Proportional to 219.39, 329.09 and 186.58

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Solution

The fourth proportional to 219.39, 329.09 and 186.58 is: 279.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.39 : 329.09 = 186.58 : x
  2. Step 2: Convert to fraction form
    219.39/329.09 = 186.58/x
  3. Step 3: Cross multiply
    219.39x = 329.09 × 186.58
  4. Step 4: Simplify right side
    219.39x = 61,401.61
  5. Step 5: Solve for x
    x = 61,401.61/219.39
  6. Step 6: Final answer
    x = 279.87

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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.