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Finding the Third Proportional to 128,260 and 197,412

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Solution

The third proportional to 128,260 and 197,412 is: 303,847.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,260 : 197,412 = 197,412 : x
  2. Step 2: Convert to fraction form
    128,260/197,412 = 197,412/x
  3. Step 3: Cross multiply
    128,260x = 197,412 × 197,412
  4. Step 4: Simplify right side
    128,260x = 38,971,497,744
  5. Step 5: Solve for x
    x = 38,971,497,744/128,260
  6. Step 6: Final answer
    x = 303,847.64

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.