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Finding the Third Proportional to 851.81 and 1,831.88

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Solution

The third proportional to 851.81 and 1,831.88 is: 3,939.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    851.81 : 1,831.88 = 1,831.88 : x
  2. Step 2: Convert to fraction form
    851.81/1,831.88 = 1,831.88/x
  3. Step 3: Cross multiply
    851.81x = 1,831.88 × 1,831.88
  4. Step 4: Simplify right side
    851.81x = 3,355,766.02
  5. Step 5: Solve for x
    x = 3,355,766.02/851.81
  6. Step 6: Final answer
    x = 3,939.56

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.