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Finding the Third Proportional to 308.63 and 440.63

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Solution

The third proportional to 308.63 and 440.63 is: 629.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.63 : 440.63 = 440.63 : x
  2. Step 2: Convert to fraction form
    308.63/440.63 = 440.63/x
  3. Step 3: Cross multiply
    308.63x = 440.63 × 440.63
  4. Step 4: Simplify right side
    308.63x = 194,150.39
  5. Step 5: Solve for x
    x = 194,150.39/308.63
  6. Step 6: Final answer
    x = 629.08

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.