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Finding the Third Proportional to 309.94 and 445.50

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Solution

The third proportional to 309.94 and 445.50 is: 640.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    309.94 : 445.50 = 445.50 : x
  2. Step 2: Convert to fraction form
    309.94/445.50 = 445.50/x
  3. Step 3: Cross multiply
    309.94x = 445.50 × 445.50
  4. Step 4: Simplify right side
    309.94x = 198,470.25
  5. Step 5: Solve for x
    x = 198,470.25/309.94
  6. Step 6: Final answer
    x = 640.36

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Why These Related Problems?

These problems maintain the same ratio (1.44) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.