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Finding the Third Proportional to 486.31 and 727.75

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Solution

The third proportional to 486.31 and 727.75 is: 1,089.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.31 : 727.75 = 727.75 : x
  2. Step 2: Convert to fraction form
    486.31/727.75 = 727.75/x
  3. Step 3: Cross multiply
    486.31x = 727.75 × 727.75
  4. Step 4: Simplify right side
    486.31x = 529,620.06
  5. Step 5: Solve for x
    x = 529,620.06/486.31
  6. Step 6: Final answer
    x = 1,089.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.