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Finding the Third Proportional to 156,440 and 320,170

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Solution

The third proportional to 156,440 and 320,170 is: 655,259.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,440 : 320,170 = 320,170 : x
  2. Step 2: Convert to fraction form
    156,440/320,170 = 320,170/x
  3. Step 3: Cross multiply
    156,440x = 320,170 × 320,170
  4. Step 4: Simplify right side
    156,440x = 102,508,828,900
  5. Step 5: Solve for x
    x = 102,508,828,900/156,440
  6. Step 6: Final answer
    x = 655,259.71

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.