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Finding the Third Proportional to 145,369 and 311,474

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Solution

The third proportional to 145,369 and 311,474 is: 667,377.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,369 : 311,474 = 311,474 : x
  2. Step 2: Convert to fraction form
    145,369/311,474 = 311,474/x
  3. Step 3: Cross multiply
    145,369x = 311,474 × 311,474
  4. Step 4: Simplify right side
    145,369x = 97,016,052,676
  5. Step 5: Solve for x
    x = 97,016,052,676/145,369
  6. Step 6: Final answer
    x = 667,377.86

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.