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Finding the Third Proportional to 143,397 and 311,670

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Solution

The third proportional to 143,397 and 311,670 is: 677,407.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,397 : 311,670 = 311,670 : x
  2. Step 2: Convert to fraction form
    143,397/311,670 = 311,670/x
  3. Step 3: Cross multiply
    143,397x = 311,670 × 311,670
  4. Step 4: Simplify right side
    143,397x = 97,138,188,900
  5. Step 5: Solve for x
    x = 97,138,188,900/143,397
  6. Step 6: Final answer
    x = 677,407.40

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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.