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Finding the Third Proportional to 408.94 and 628.59

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Solution

The third proportional to 408.94 and 628.59 is: 966.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    408.94 : 628.59 = 628.59 : x
  2. Step 2: Convert to fraction form
    408.94/628.59 = 628.59/x
  3. Step 3: Cross multiply
    408.94x = 628.59 × 628.59
  4. Step 4: Simplify right side
    408.94x = 395,130.10
  5. Step 5: Solve for x
    x = 395,130.10/408.94
  6. Step 6: Final answer
    x = 966.24

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.