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Finding the Fourth Proportional to 490.79, 676.72 and 372.47

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Solution

The fourth proportional to 490.79, 676.72 and 372.47 is: 513.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.79 : 676.72 = 372.47 : x
  2. Step 2: Convert to fraction form
    490.79/676.72 = 372.47/x
  3. Step 3: Cross multiply
    490.79x = 676.72 × 372.47
  4. Step 4: Simplify right side
    490.79x = 252,059.31
  5. Step 5: Solve for x
    x = 252,059.31/490.79
  6. Step 6: Final answer
    x = 513.58

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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.