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Finding the Fourth Proportional to 814.58, 1,222.79 and 327.97

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Solution

The fourth proportional to 814.58, 1,222.79 and 327.97 is: 492.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    814.58 : 1,222.79 = 327.97 : x
  2. Step 2: Convert to fraction form
    814.58/1,222.79 = 327.97/x
  3. Step 3: Cross multiply
    814.58x = 1,222.79 × 327.97
  4. Step 4: Simplify right side
    814.58x = 401,038.44
  5. Step 5: Solve for x
    x = 401,038.44/814.58
  6. Step 6: Final answer
    x = 492.33

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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.