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Finding the Third Proportional to 1.11 and 1.45

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Solution

The third proportional to 1.11 and 1.45 is: 1.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1.11 : 1.45 = 1.45 : x
  2. Step 2: Convert to fraction form
    1.11/1.45 = 1.45/x
  3. Step 3: Cross multiply
    1.11x = 1.45 × 1.45
  4. Step 4: Simplify right side
    1.11x = 2.11
  5. Step 5: Solve for x
    x = 2.11/1.11
  6. Step 6: Final answer
    x = 1.90

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Why These Related Problems?

These problems maintain the same ratio (1.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.