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Finding the Third Proportional to 286.75 and 515.75

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Solution

The third proportional to 286.75 and 515.75 is: 927.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.75 : 515.75 = 515.75 : x
  2. Step 2: Convert to fraction form
    286.75/515.75 = 515.75/x
  3. Step 3: Cross multiply
    286.75x = 515.75 × 515.75
  4. Step 4: Simplify right side
    286.75x = 265,998.06
  5. Step 5: Solve for x
    x = 265,998.06/286.75
  6. Step 6: Final answer
    x = 927.63

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Why These Related Problems?

These problems maintain the same ratio (1.80) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.