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Finding the Third Proportional to 207,270 and 316,918

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Solution

The third proportional to 207,270 and 316,918 is: 484,570.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,270 : 316,918 = 316,918 : x
  2. Step 2: Convert to fraction form
    207,270/316,918 = 316,918/x
  3. Step 3: Cross multiply
    207,270x = 316,918 × 316,918
  4. Step 4: Simplify right side
    207,270x = 100,437,018,724
  5. Step 5: Solve for x
    x = 100,437,018,724/207,270
  6. Step 6: Final answer
    x = 484,570.94

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.