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Finding the Third Proportional to 272,136 and 422,400

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Solution

The third proportional to 272,136 and 422,400 is: 655,634.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,136 : 422,400 = 422,400 : x
  2. Step 2: Convert to fraction form
    272,136/422,400 = 422,400/x
  3. Step 3: Cross multiply
    272,136x = 422,400 × 422,400
  4. Step 4: Simplify right side
    272,136x = 178,421,760,000
  5. Step 5: Solve for x
    x = 178,421,760,000/272,136
  6. Step 6: Final answer
    x = 655,634.54

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.