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Finding the Third Proportional to 318.94 and 630.56

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Solution

The third proportional to 318.94 and 630.56 is: 1,246.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.94 : 630.56 = 630.56 : x
  2. Step 2: Convert to fraction form
    318.94/630.56 = 630.56/x
  3. Step 3: Cross multiply
    318.94x = 630.56 × 630.56
  4. Step 4: Simplify right side
    318.94x = 397,609.07
  5. Step 5: Solve for x
    x = 397,609.07/318.94
  6. Step 6: Final answer
    x = 1,246.67

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Why These Related Problems?

These problems maintain the same ratio (1.98) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.