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Finding the Fourth Proportional to 219.30, 327.08 and 211.56

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Solution

The fourth proportional to 219.30, 327.08 and 211.56 is: 315.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.30 : 327.08 = 211.56 : x
  2. Step 2: Convert to fraction form
    219.30/327.08 = 211.56/x
  3. Step 3: Cross multiply
    219.30x = 327.08 × 211.56
  4. Step 4: Simplify right side
    219.30x = 69,195.99
  5. Step 5: Solve for x
    x = 69,195.99/219.30
  6. Step 6: Final answer
    x = 315.53

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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.