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Finding the Third Proportional to 309.52 and 666.14

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Solution

The third proportional to 309.52 and 666.14 is: 1,433.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    309.52 : 666.14 = 666.14 : x
  2. Step 2: Convert to fraction form
    309.52/666.14 = 666.14/x
  3. Step 3: Cross multiply
    309.52x = 666.14 × 666.14
  4. Step 4: Simplify right side
    309.52x = 443,743.33
  5. Step 5: Solve for x
    x = 443,743.33/309.52
  6. Step 6: Final answer
    x = 1,433.67

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.