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Finding the Third Proportional to 189.56 and 254.81

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Solution

The third proportional to 189.56 and 254.81 is: 342.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.56 : 254.81 = 254.81 : x
  2. Step 2: Convert to fraction form
    189.56/254.81 = 254.81/x
  3. Step 3: Cross multiply
    189.56x = 254.81 × 254.81
  4. Step 4: Simplify right side
    189.56x = 64,929.41
  5. Step 5: Solve for x
    x = 64,929.41/189.56
  6. Step 6: Final answer
    x = 342.52

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Why These Related Problems?

These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.