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Finding the Third Proportional to 306.38 and 459.38

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Solution

The third proportional to 306.38 and 459.38 is: 688.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.38 : 459.38 = 459.38 : x
  2. Step 2: Convert to fraction form
    306.38/459.38 = 459.38/x
  3. Step 3: Cross multiply
    306.38x = 459.38 × 459.38
  4. Step 4: Simplify right side
    306.38x = 211,025.39
  5. Step 5: Solve for x
    x = 211,025.39/306.38
  6. Step 6: Final answer
    x = 688.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.