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Finding the Third Proportional to 207,316 and 320,136

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Solution

The third proportional to 207,316 and 320,136 is: 494,351.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,316 : 320,136 = 320,136 : x
  2. Step 2: Convert to fraction form
    207,316/320,136 = 320,136/x
  3. Step 3: Cross multiply
    207,316x = 320,136 × 320,136
  4. Step 4: Simplify right side
    207,316x = 102,487,058,496
  5. Step 5: Solve for x
    x = 102,487,058,496/207,316
  6. Step 6: Final answer
    x = 494,351.90

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.