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Finding the Fourth Proportional to 219.09, 326.75 and 186.80

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Solution

The fourth proportional to 219.09, 326.75 and 186.80 is: 278.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.09 : 326.75 = 186.80 : x
  2. Step 2: Convert to fraction form
    219.09/326.75 = 186.80/x
  3. Step 3: Cross multiply
    219.09x = 326.75 × 186.80
  4. Step 4: Simplify right side
    219.09x = 61,034.33
  5. Step 5: Solve for x
    x = 61,034.33/219.09
  6. Step 6: Final answer
    x = 278.58

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.