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Finding the Third Proportional to 1.86 and 3.55

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Solution

The third proportional to 1.86 and 3.55 is: 6.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1.86 : 3.55 = 3.55 : x
  2. Step 2: Convert to fraction form
    1.86/3.55 = 3.55/x
  3. Step 3: Cross multiply
    1.86x = 3.55 × 3.55
  4. Step 4: Simplify right side
    1.86x = 12.59
  5. Step 5: Solve for x
    x = 12.59/1.86
  6. Step 6: Final answer
    x = 6.75

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Why These Related Problems?

These problems maintain the same ratio (1.90) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.