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Finding the Third Proportional to 186,990 and 400,251

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Solution

The third proportional to 186,990 and 400,251 is: 856,734.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,990 : 400,251 = 400,251 : x
  2. Step 2: Convert to fraction form
    186,990/400,251 = 400,251/x
  3. Step 3: Cross multiply
    186,990x = 400,251 × 400,251
  4. Step 4: Simplify right side
    186,990x = 160,200,863,001
  5. Step 5: Solve for x
    x = 160,200,863,001/186,990
  6. Step 6: Final answer
    x = 856,734.92

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.