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Finding the Third Proportional to 628.88 and 925.31

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Solution

The third proportional to 628.88 and 925.31 is: 1,361.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.88 : 925.31 = 925.31 : x
  2. Step 2: Convert to fraction form
    628.88/925.31 = 925.31/x
  3. Step 3: Cross multiply
    628.88x = 925.31 × 925.31
  4. Step 4: Simplify right side
    628.88x = 856,203.22
  5. Step 5: Solve for x
    x = 856,203.22/628.88
  6. Step 6: Final answer
    x = 1,361.48

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.