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Finding the Fourth Proportional to 323.36, 445.56 and 219.68

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Solution

The fourth proportional to 323.36, 445.56 and 219.68 is: 302.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    323.36 : 445.56 = 219.68 : x
  2. Step 2: Convert to fraction form
    323.36/445.56 = 219.68/x
  3. Step 3: Cross multiply
    323.36x = 445.56 × 219.68
  4. Step 4: Simplify right side
    323.36x = 97,880.62
  5. Step 5: Solve for x
    x = 97,880.62/323.36
  6. Step 6: Final answer
    x = 302.70

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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.