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Finding the Third Proportional to 208,388 and 311,208

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Solution

The third proportional to 208,388 and 311,208 is: 464,760.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,388 : 311,208 = 311,208 : x
  2. Step 2: Convert to fraction form
    208,388/311,208 = 311,208/x
  3. Step 3: Cross multiply
    208,388x = 311,208 × 311,208
  4. Step 4: Simplify right side
    208,388x = 96,850,419,264
  5. Step 5: Solve for x
    x = 96,850,419,264/208,388
  6. Step 6: Final answer
    x = 464,760.06

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.