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Finding the Third Proportional to 1.98 and 4.27

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Solution

The third proportional to 1.98 and 4.27 is: 9.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1.98 : 4.27 = 4.27 : x
  2. Step 2: Convert to fraction form
    1.98/4.27 = 4.27/x
  3. Step 3: Cross multiply
    1.98x = 4.27 × 4.27
  4. Step 4: Simplify right side
    1.98x = 18.25
  5. Step 5: Solve for x
    x = 18.25/1.98
  6. Step 6: Final answer
    x = 9.23

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.