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Finding the Third Proportional to 1.35 and 3.72

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Solution

The third proportional to 1.35 and 3.72 is: 10.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1.35 : 3.72 = 3.72 : x
  2. Step 2: Convert to fraction form
    1.35/3.72 = 3.72/x
  3. Step 3: Cross multiply
    1.35x = 3.72 × 3.72
  4. Step 4: Simplify right side
    1.35x = 13.81
  5. Step 5: Solve for x
    x = 13.81/1.35
  6. Step 6: Final answer
    x = 10.22

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Why These Related Problems?

These problems maintain the same ratio (2.75) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.