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Finding the Third Proportional to 1.97 and 4.78

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Solution

The third proportional to 1.97 and 4.78 is: 11.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1.97 : 4.78 = 4.78 : x
  2. Step 2: Convert to fraction form
    1.97/4.78 = 4.78/x
  3. Step 3: Cross multiply
    1.97x = 4.78 × 4.78
  4. Step 4: Simplify right side
    1.97x = 22.86
  5. Step 5: Solve for x
    x = 22.86/1.97
  6. Step 6: Final answer
    x = 11.61

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Why These Related Problems?

These problems maintain the same ratio (2.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.