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Finding the Third Proportional to 718.25 and 1,090.25

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Solution

The third proportional to 718.25 and 1,090.25 is: 1,654.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    718.25 : 1,090.25 = 1,090.25 : x
  2. Step 2: Convert to fraction form
    718.25/1,090.25 = 1,090.25/x
  3. Step 3: Cross multiply
    718.25x = 1,090.25 × 1,090.25
  4. Step 4: Simplify right side
    718.25x = 1,188,645.06
  5. Step 5: Solve for x
    x = 1,188,645.06/718.25
  6. Step 6: Final answer
    x = 1,654.92

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.