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Finding the Third Proportional to 164,310 and 336,390

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Solution

The third proportional to 164,310 and 336,390 is: 688,687.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    164,310 : 336,390 = 336,390 : x
  2. Step 2: Convert to fraction form
    164,310/336,390 = 336,390/x
  3. Step 3: Cross multiply
    164,310x = 336,390 × 336,390
  4. Step 4: Simplify right side
    164,310x = 113,158,232,100
  5. Step 5: Solve for x
    x = 113,158,232,100/164,310
  6. Step 6: Final answer
    x = 688,687.43

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.