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Finding the Third Proportional to 311,136 and 606,720

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Solution

The third proportional to 311,136 and 606,720 is: 1,183,113.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,136 : 606,720 = 606,720 : x
  2. Step 2: Convert to fraction form
    311,136/606,720 = 606,720/x
  3. Step 3: Cross multiply
    311,136x = 606,720 × 606,720
  4. Step 4: Simplify right side
    311,136x = 368,109,158,400
  5. Step 5: Solve for x
    x = 368,109,158,400/311,136
  6. Step 6: Final answer
    x = 1,183,113.36

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Why These Related Problems?

These problems maintain the same ratio (1.95) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.