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Finding the Third Proportional to 186,399 and 398,920

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Solution

The third proportional to 186,399 and 398,920 is: 853,744.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,399 : 398,920 = 398,920 : x
  2. Step 2: Convert to fraction form
    186,399/398,920 = 398,920/x
  3. Step 3: Cross multiply
    186,399x = 398,920 × 398,920
  4. Step 4: Simplify right side
    186,399x = 159,137,166,400
  5. Step 5: Solve for x
    x = 159,137,166,400/186,399
  6. Step 6: Final answer
    x = 853,744.74

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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.