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Finding the Third Proportional to 859.78 and 1,811.95

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Solution

The third proportional to 859.78 and 1,811.95 is: 3,818.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    859.78 : 1,811.95 = 1,811.95 : x
  2. Step 2: Convert to fraction form
    859.78/1,811.95 = 1,811.95/x
  3. Step 3: Cross multiply
    859.78x = 1,811.95 × 1,811.95
  4. Step 4: Simplify right side
    859.78x = 3,283,174.13
  5. Step 5: Solve for x
    x = 3,283,174.13/859.78
  6. Step 6: Final answer
    x = 3,818.62

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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.