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Finding the Fourth Proportional to 326.20, 488.82 and 181.72

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Solution

The fourth proportional to 326.20, 488.82 and 181.72 is: 272.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.20 : 488.82 = 181.72 : x
  2. Step 2: Convert to fraction form
    326.20/488.82 = 181.72/x
  3. Step 3: Cross multiply
    326.20x = 488.82 × 181.72
  4. Step 4: Simplify right side
    326.20x = 88,828.37
  5. Step 5: Solve for x
    x = 88,828.37/326.20
  6. Step 6: Final answer
    x = 272.31

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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.