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Finding the Third Proportional to 256,136 and 551,728

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Solution

The third proportional to 256,136 and 551,728 is: 1,188,445.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,136 : 551,728 = 551,728 : x
  2. Step 2: Convert to fraction form
    256,136/551,728 = 551,728/x
  3. Step 3: Cross multiply
    256,136x = 551,728 × 551,728
  4. Step 4: Simplify right side
    256,136x = 304,403,785,984
  5. Step 5: Solve for x
    x = 304,403,785,984/256,136
  6. Step 6: Final answer
    x = 1,188,445.93

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.