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Finding the Third Proportional to 213,112 and 355,138

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Solution

The third proportional to 213,112 and 355,138 is: 591,815.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,112 : 355,138 = 355,138 : x
  2. Step 2: Convert to fraction form
    213,112/355,138 = 355,138/x
  3. Step 3: Cross multiply
    213,112x = 355,138 × 355,138
  4. Step 4: Simplify right side
    213,112x = 126,122,999,044
  5. Step 5: Solve for x
    x = 126,122,999,044/213,112
  6. Step 6: Final answer
    x = 591,815.57

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Why These Related Problems?

These problems maintain the same ratio (1.67) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.