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Finding the Third Proportional to 135.42 and 208.83

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Solution

The third proportional to 135.42 and 208.83 is: 322.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    135.42 : 208.83 = 208.83 : x
  2. Step 2: Convert to fraction form
    135.42/208.83 = 208.83/x
  3. Step 3: Cross multiply
    135.42x = 208.83 × 208.83
  4. Step 4: Simplify right side
    135.42x = 43,609.19
  5. Step 5: Solve for x
    x = 43,609.19/135.42
  6. Step 6: Final answer
    x = 322.02

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.