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Finding the Third Proportional to 408,312 and 612,876

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Solution

The third proportional to 408,312 and 612,876 is: 919,926.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,312 : 612,876 = 612,876 : x
  2. Step 2: Convert to fraction form
    408,312/612,876 = 612,876/x
  3. Step 3: Cross multiply
    408,312x = 612,876 × 612,876
  4. Step 4: Simplify right side
    408,312x = 375,616,991,376
  5. Step 5: Solve for x
    x = 375,616,991,376/408,312
  6. Step 6: Final answer
    x = 919,926.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.