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Finding the Third Proportional to 272,064 and 422,688

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Solution

The third proportional to 272,064 and 422,688 is: 656,702.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,064 : 422,688 = 422,688 : x
  2. Step 2: Convert to fraction form
    272,064/422,688 = 422,688/x
  3. Step 3: Cross multiply
    272,064x = 422,688 × 422,688
  4. Step 4: Simplify right side
    272,064x = 178,665,145,344
  5. Step 5: Solve for x
    x = 178,665,145,344/272,064
  6. Step 6: Final answer
    x = 656,702.63

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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.