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Finding the Third Proportional to 256,136 and 411,541

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Solution

The third proportional to 256,136 and 411,541 is: 661,234.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,136 : 411,541 = 411,541 : x
  2. Step 2: Convert to fraction form
    256,136/411,541 = 411,541/x
  3. Step 3: Cross multiply
    256,136x = 411,541 × 411,541
  4. Step 4: Simplify right side
    256,136x = 169,365,994,681
  5. Step 5: Solve for x
    x = 169,365,994,681/256,136
  6. Step 6: Final answer
    x = 661,234.64

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Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.