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Finding the Third Proportional to 422,912 and 915,946

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Solution

The third proportional to 422,912 and 915,946 is: 1,983,762.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,912 : 915,946 = 915,946 : x
  2. Step 2: Convert to fraction form
    422,912/915,946 = 915,946/x
  3. Step 3: Cross multiply
    422,912x = 915,946 × 915,946
  4. Step 4: Simplify right side
    422,912x = 838,957,074,916
  5. Step 5: Solve for x
    x = 838,957,074,916/422,912
  6. Step 6: Final answer
    x = 1,983,762.76

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.