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Finding the Third Proportional to 25.22 and 40.64

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Solution

The third proportional to 25.22 and 40.64 is: 65.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    25.22 : 40.64 = 40.64 : x
  2. Step 2: Convert to fraction form
    25.22/40.64 = 40.64/x
  3. Step 3: Cross multiply
    25.22x = 40.64 × 40.64
  4. Step 4: Simplify right side
    25.22x = 1,651.66
  5. Step 5: Solve for x
    x = 1,651.66/25.22
  6. Step 6: Final answer
    x = 65.49

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Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.