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Finding the Third Proportional to 373,911 and 815,490

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Solution

The third proportional to 373,911 and 815,490 is: 1,778,562.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    373,911 : 815,490 = 815,490 : x
  2. Step 2: Convert to fraction form
    373,911/815,490 = 815,490/x
  3. Step 3: Cross multiply
    373,911x = 815,490 × 815,490
  4. Step 4: Simplify right side
    373,911x = 665,023,940,100
  5. Step 5: Solve for x
    x = 665,023,940,100/373,911
  6. Step 6: Final answer
    x = 1,778,562.12

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.