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Finding the Third Proportional to 851.38 and 1,438.75

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Solution

The third proportional to 851.38 and 1,438.75 is: 2,431.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    851.38 : 1,438.75 = 1,438.75 : x
  2. Step 2: Convert to fraction form
    851.38/1,438.75 = 1,438.75/x
  3. Step 3: Cross multiply
    851.38x = 1,438.75 × 1,438.75
  4. Step 4: Simplify right side
    851.38x = 2,070,001.56
  5. Step 5: Solve for x
    x = 2,070,001.56/851.38
  6. Step 6: Final answer
    x = 2,431.36

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Why These Related Problems?

These problems maintain the same ratio (1.69) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.