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Finding the Third Proportional to 0.55 and 1.21

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Solution

The third proportional to 0.55 and 1.21 is: 2.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    0.55 : 1.21 = 1.21 : x
  2. Step 2: Convert to fraction form
    0.55/1.21 = 1.21/x
  3. Step 3: Cross multiply
    0.55x = 1.21 × 1.21
  4. Step 4: Simplify right side
    0.55x = 1.46
  5. Step 5: Solve for x
    x = 1.46/0.55
  6. Step 6: Final answer
    x = 2.65

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.