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Finding the Third Proportional to 292,412 and 440,778

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Solution

The third proportional to 292,412 and 440,778 is: 664,422.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,412 : 440,778 = 440,778 : x
  2. Step 2: Convert to fraction form
    292,412/440,778 = 440,778/x
  3. Step 3: Cross multiply
    292,412x = 440,778 × 440,778
  4. Step 4: Simplify right side
    292,412x = 194,285,245,284
  5. Step 5: Solve for x
    x = 194,285,245,284/292,412
  6. Step 6: Final answer
    x = 664,422.96

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.