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Finding the Third Proportional to 628.88 and 903.09

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Solution

The third proportional to 628.88 and 903.09 is: 1,296.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.88 : 903.09 = 903.09 : x
  2. Step 2: Convert to fraction form
    628.88/903.09 = 903.09/x
  3. Step 3: Cross multiply
    628.88x = 903.09 × 903.09
  4. Step 4: Simplify right side
    628.88x = 815,578.32
  5. Step 5: Solve for x
    x = 815,578.32/628.88
  6. Step 6: Final answer
    x = 1,296.88

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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.