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Finding the Third Proportional to 318,872 and 699,946

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Solution

The third proportional to 318,872 and 699,946 is: 1,536,429.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,872 : 699,946 = 699,946 : x
  2. Step 2: Convert to fraction form
    318,872/699,946 = 699,946/x
  3. Step 3: Cross multiply
    318,872x = 699,946 × 699,946
  4. Step 4: Simplify right side
    318,872x = 489,924,402,916
  5. Step 5: Solve for x
    x = 489,924,402,916/318,872
  6. Step 6: Final answer
    x = 1,536,429.67

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.