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Finding the Fourth Proportional to 490.20, 676.50 and 293.70

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Solution

The fourth proportional to 490.20, 676.50 and 293.70 is: 405.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.20 : 676.50 = 293.70 : x
  2. Step 2: Convert to fraction form
    490.20/676.50 = 293.70/x
  3. Step 3: Cross multiply
    490.20x = 676.50 × 293.70
  4. Step 4: Simplify right side
    490.20x = 198,688.05
  5. Step 5: Solve for x
    x = 198,688.05/490.20
  6. Step 6: Final answer
    x = 405.32

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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.