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Finding the Third Proportional to 140,242 and 211,815

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Solution

The third proportional to 140,242 and 211,815 is: 319,915.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,242 : 211,815 = 211,815 : x
  2. Step 2: Convert to fraction form
    140,242/211,815 = 211,815/x
  3. Step 3: Cross multiply
    140,242x = 211,815 × 211,815
  4. Step 4: Simplify right side
    140,242x = 44,865,594,225
  5. Step 5: Solve for x
    x = 44,865,594,225/140,242
  6. Step 6: Final answer
    x = 319,915.53

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.