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Finding the Third Proportional to 1.11 and 2.40

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Solution

The third proportional to 1.11 and 2.40 is: 5.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1.11 : 2.40 = 2.40 : x
  2. Step 2: Convert to fraction form
    1.11/2.40 = 2.40/x
  3. Step 3: Cross multiply
    1.11x = 2.40 × 2.40
  4. Step 4: Simplify right side
    1.11x = 5.77
  5. Step 5: Solve for x
    x = 5.77/1.11
  6. Step 6: Final answer
    x = 5.18

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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.