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Finding the Third Proportional to 128,274 and 197,454

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Solution

The third proportional to 128,274 and 197,454 is: 303,943.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,274 : 197,454 = 197,454 : x
  2. Step 2: Convert to fraction form
    128,274/197,454 = 197,454/x
  3. Step 3: Cross multiply
    128,274x = 197,454 × 197,454
  4. Step 4: Simplify right side
    128,274x = 38,988,082,116
  5. Step 5: Solve for x
    x = 38,988,082,116/128,274
  6. Step 6: Final answer
    x = 303,943.76

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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.