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Finding the Third Proportional to 2.50 and 3.98

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Solution

The third proportional to 2.50 and 3.98 is: 6.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2.50 : 3.98 = 3.98 : x
  2. Step 2: Convert to fraction form
    2.50/3.98 = 3.98/x
  3. Step 3: Cross multiply
    2.50x = 3.98 × 3.98
  4. Step 4: Simplify right side
    2.50x = 15.87
  5. Step 5: Solve for x
    x = 15.87/2.50
  6. Step 6: Final answer
    x = 6.35

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.