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Finding the Third Proportional to 318.30 and 606.23

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Solution

The third proportional to 318.30 and 606.23 is: 1,154.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.30 : 606.23 = 606.23 : x
  2. Step 2: Convert to fraction form
    318.30/606.23 = 606.23/x
  3. Step 3: Cross multiply
    318.30x = 606.23 × 606.23
  4. Step 4: Simplify right side
    318.30x = 367,520.12
  5. Step 5: Solve for x
    x = 367,520.12/318.30
  6. Step 6: Final answer
    x = 1,154.62

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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.