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Finding the Third Proportional to 719.75 and 1,090.39

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Solution

The third proportional to 719.75 and 1,090.39 is: 1,651.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.75 : 1,090.39 = 1,090.39 : x
  2. Step 2: Convert to fraction form
    719.75/1,090.39 = 1,090.39/x
  3. Step 3: Cross multiply
    719.75x = 1,090.39 × 1,090.39
  4. Step 4: Simplify right side
    719.75x = 1,188,951.72
  5. Step 5: Solve for x
    x = 1,188,951.72/719.75
  6. Step 6: Final answer
    x = 1,651.90

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.