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Finding the Third Proportional to 245.94 and 394.94

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Solution

The third proportional to 245.94 and 394.94 is: 634.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.94 : 394.94 = 394.94 : x
  2. Step 2: Convert to fraction form
    245.94/394.94 = 394.94/x
  3. Step 3: Cross multiply
    245.94x = 394.94 × 394.94
  4. Step 4: Simplify right side
    245.94x = 155,975.63
  5. Step 5: Solve for x
    x = 155,975.63/245.94
  6. Step 6: Final answer
    x = 634.21

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Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.