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Finding the Third Proportional to 197,012.25 and 312,012

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Solution

The third proportional to 197,012.25 and 312,012 is: 494,139.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    197,012.25 : 312,012 = 312,012 : x
  2. Step 2: Convert to fraction form
    197,012.25/312,012 = 312,012/x
  3. Step 3: Cross multiply
    197,012.25x = 312,012 × 312,012
  4. Step 4: Simplify right side
    197,012.25x = 97,351,488,144
  5. Step 5: Solve for x
    x = 97,351,488,144/197,012.25
  6. Step 6: Final answer
    x = 494,139.26

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Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.