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Finding the Third Proportional to 318,180 and 445,986

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Solution

The third proportional to 318,180 and 445,986 is: 625,128.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,180 : 445,986 = 445,986 : x
  2. Step 2: Convert to fraction form
    318,180/445,986 = 445,986/x
  3. Step 3: Cross multiply
    318,180x = 445,986 × 445,986
  4. Step 4: Simplify right side
    318,180x = 198,903,512,196
  5. Step 5: Solve for x
    x = 198,903,512,196/318,180
  6. Step 6: Final answer
    x = 625,128.90

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.