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Finding the Third Proportional to 859.99 and 1,871.86

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Solution

The third proportional to 859.99 and 1,871.86 is: 4,074.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    859.99 : 1,871.86 = 1,871.86 : x
  2. Step 2: Convert to fraction form
    859.99/1,871.86 = 1,871.86/x
  3. Step 3: Cross multiply
    859.99x = 1,871.86 × 1,871.86
  4. Step 4: Simplify right side
    859.99x = 3,503,857.52
  5. Step 5: Solve for x
    x = 3,503,857.52/859.99
  6. Step 6: Final answer
    x = 4,074.29

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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.