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Finding the Third Proportional to 196,278 and 311,298

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Solution

The third proportional to 196,278 and 311,298 is: 493,720.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    196,278 : 311,298 = 311,298 : x
  2. Step 2: Convert to fraction form
    196,278/311,298 = 311,298/x
  3. Step 3: Cross multiply
    196,278x = 311,298 × 311,298
  4. Step 4: Simplify right side
    196,278x = 96,906,444,804
  5. Step 5: Solve for x
    x = 96,906,444,804/196,278
  6. Step 6: Final answer
    x = 493,720.36

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.