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Finding the Third Proportional to 828.75 and 2,123.06

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Solution

The third proportional to 828.75 and 2,123.06 is: 5,438.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    828.75 : 2,123.06 = 2,123.06 : x
  2. Step 2: Convert to fraction form
    828.75/2,123.06 = 2,123.06/x
  3. Step 3: Cross multiply
    828.75x = 2,123.06 × 2,123.06
  4. Step 4: Simplify right side
    828.75x = 4,507,394.38
  5. Step 5: Solve for x
    x = 4,507,394.38/828.75
  6. Step 6: Final answer
    x = 5,438.79

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Why These Related Problems?

These problems maintain the same ratio (2.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.