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Finding the Third Proportional to 138.45 and 301.29

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Solution

The third proportional to 138.45 and 301.29 is: 655.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    138.45 : 301.29 = 301.29 : x
  2. Step 2: Convert to fraction form
    138.45/301.29 = 301.29/x
  3. Step 3: Cross multiply
    138.45x = 301.29 × 301.29
  4. Step 4: Simplify right side
    138.45x = 90,775.10
  5. Step 5: Solve for x
    x = 90,775.10/138.45
  6. Step 6: Final answer
    x = 655.67

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.