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Finding the Third Proportional to 383.75 and 828.75

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Solution

The third proportional to 383.75 and 828.75 is: 1,789.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.75 : 828.75 = 828.75 : x
  2. Step 2: Convert to fraction form
    383.75/828.75 = 828.75/x
  3. Step 3: Cross multiply
    383.75x = 828.75 × 828.75
  4. Step 4: Simplify right side
    383.75x = 686,826.56
  5. Step 5: Solve for x
    x = 686,826.56/383.75
  6. Step 6: Final answer
    x = 1,789.78

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.