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Finding the Third Proportional to 859.31 and 1,869.56

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Solution

The third proportional to 859.31 and 1,869.56 is: 4,067.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    859.31 : 1,869.56 = 1,869.56 : x
  2. Step 2: Convert to fraction form
    859.31/1,869.56 = 1,869.56/x
  3. Step 3: Cross multiply
    859.31x = 1,869.56 × 1,869.56
  4. Step 4: Simplify right side
    859.31x = 3,495,263.94
  5. Step 5: Solve for x
    x = 3,495,263.94/859.31
  6. Step 6: Final answer
    x = 4,067.51

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.