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Finding the Fourth Proportional to 488.44, 673.46 and 394.90

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Solution

The fourth proportional to 488.44, 673.46 and 394.90 is: 544.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.44 : 673.46 = 394.90 : x
  2. Step 2: Convert to fraction form
    488.44/673.46 = 394.90/x
  3. Step 3: Cross multiply
    488.44x = 673.46 × 394.90
  4. Step 4: Simplify right side
    488.44x = 265,949.35
  5. Step 5: Solve for x
    x = 265,949.35/488.44
  6. Step 6: Final answer
    x = 544.49

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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.