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Finding the Third Proportional to 308,416 and 672,720

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Solution

The third proportional to 308,416 and 672,720 is: 1,467,343.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,416 : 672,720 = 672,720 : x
  2. Step 2: Convert to fraction form
    308,416/672,720 = 672,720/x
  3. Step 3: Cross multiply
    308,416x = 672,720 × 672,720
  4. Step 4: Simplify right side
    308,416x = 452,552,198,400
  5. Step 5: Solve for x
    x = 452,552,198,400/308,416
  6. Step 6: Final answer
    x = 1,467,343.45

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.