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Finding the Third Proportional to 764.25 and 1,115.25

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Solution

The third proportional to 764.25 and 1,115.25 is: 1,627.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    764.25 : 1,115.25 = 1,115.25 : x
  2. Step 2: Convert to fraction form
    764.25/1,115.25 = 1,115.25/x
  3. Step 3: Cross multiply
    764.25x = 1,115.25 × 1,115.25
  4. Step 4: Simplify right side
    764.25x = 1,243,782.56
  5. Step 5: Solve for x
    x = 1,243,782.56/764.25
  6. Step 6: Final answer
    x = 1,627.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.