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Finding the Fourth Proportional to 219.22, 328.62 and 132.45

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Solution

The fourth proportional to 219.22, 328.62 and 132.45 is: 198.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.22 : 328.62 = 132.45 : x
  2. Step 2: Convert to fraction form
    219.22/328.62 = 132.45/x
  3. Step 3: Cross multiply
    219.22x = 328.62 × 132.45
  4. Step 4: Simplify right side
    219.22x = 43,524.98
  5. Step 5: Solve for x
    x = 43,524.98/219.22
  6. Step 6: Final answer
    x = 198.55

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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.