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Finding the Fourth Proportional to 326.98, 451.22 and 187.09

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Solution

The fourth proportional to 326.98, 451.22 and 187.09 is: 258.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.98 : 451.22 = 187.09 : x
  2. Step 2: Convert to fraction form
    326.98/451.22 = 187.09/x
  3. Step 3: Cross multiply
    326.98x = 451.22 × 187.09
  4. Step 4: Simplify right side
    326.98x = 84,418.75
  5. Step 5: Solve for x
    x = 84,418.75/326.98
  6. Step 6: Final answer
    x = 258.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.