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Finding the Third Proportional to 313,954 and 686,228

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Solution

The third proportional to 313,954 and 686,228 is: 1,499,929.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,954 : 686,228 = 686,228 : x
  2. Step 2: Convert to fraction form
    313,954/686,228 = 686,228/x
  3. Step 3: Cross multiply
    313,954x = 686,228 × 686,228
  4. Step 4: Simplify right side
    313,954x = 470,908,867,984
  5. Step 5: Solve for x
    x = 470,908,867,984/313,954
  6. Step 6: Final answer
    x = 1,499,929.51

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.