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Finding the Third Proportional to 4.40 and 9.40

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Solution

The third proportional to 4.40 and 9.40 is: 20.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    4.40 : 9.40 = 9.40 : x
  2. Step 2: Convert to fraction form
    4.40/9.40 = 9.40/x
  3. Step 3: Cross multiply
    4.40x = 9.40 × 9.40
  4. Step 4: Simplify right side
    4.40x = 88.28
  5. Step 5: Solve for x
    x = 88.28/4.40
  6. Step 6: Final answer
    x = 20.06

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.