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Finding the Third Proportional to 810 and 1,157.25

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Solution

The third proportional to 810 and 1,157.25 is: 1,653.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    810 : 1,157.25 = 1,157.25 : x
  2. Step 2: Convert to fraction form
    810/1,157.25 = 1,157.25/x
  3. Step 3: Cross multiply
    810x = 1,157.25 × 1,157.25
  4. Step 4: Simplify right side
    810x = 1,339,227.56
  5. Step 5: Solve for x
    x = 1,339,227.56/810
  6. Step 6: Final answer
    x = 1,653.37

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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.