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Finding the Fourth Proportional to 219.09, 329.06 and 188.31

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Solution

The fourth proportional to 219.09, 329.06 and 188.31 is: 282.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.09 : 329.06 = 188.31 : x
  2. Step 2: Convert to fraction form
    219.09/329.06 = 188.31/x
  3. Step 3: Cross multiply
    219.09x = 329.06 × 188.31
  4. Step 4: Simplify right side
    219.09x = 61,965.29
  5. Step 5: Solve for x
    x = 61,965.29/219.09
  6. Step 6: Final answer
    x = 282.83

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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.