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Finding the Third Proportional to 153,920 and 329,740

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Solution

The third proportional to 153,920 and 329,740 is: 706,395.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,920 : 329,740 = 329,740 : x
  2. Step 2: Convert to fraction form
    153,920/329,740 = 329,740/x
  3. Step 3: Cross multiply
    153,920x = 329,740 × 329,740
  4. Step 4: Simplify right side
    153,920x = 108,728,467,600
  5. Step 5: Solve for x
    x = 108,728,467,600/153,920
  6. Step 6: Final answer
    x = 706,395.97

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.