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Finding the Third Proportional to 392.63 and 828.56

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Solution

The third proportional to 392.63 and 828.56 is: 1,748.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.63 : 828.56 = 828.56 : x
  2. Step 2: Convert to fraction form
    392.63/828.56 = 828.56/x
  3. Step 3: Cross multiply
    392.63x = 828.56 × 828.56
  4. Step 4: Simplify right side
    392.63x = 686,515.82
  5. Step 5: Solve for x
    x = 686,515.82/392.63
  6. Step 6: Final answer
    x = 1,748.53

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.