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Finding the Fourth Proportional to 490.42, 676.59 and 324.73

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Solution

The fourth proportional to 490.42, 676.59 and 324.73 is: 448.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.42 : 676.59 = 324.73 : x
  2. Step 2: Convert to fraction form
    490.42/676.59 = 324.73/x
  3. Step 3: Cross multiply
    490.42x = 676.59 × 324.73
  4. Step 4: Simplify right side
    490.42x = 219,709.07
  5. Step 5: Solve for x
    x = 219,709.07/490.42
  6. Step 6: Final answer
    x = 448.00

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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.