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Finding the Third Proportional to 256,060 and 387,628

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Solution

The third proportional to 256,060 and 387,628 is: 586,797.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,060 : 387,628 = 387,628 : x
  2. Step 2: Convert to fraction form
    256,060/387,628 = 387,628/x
  3. Step 3: Cross multiply
    256,060x = 387,628 × 387,628
  4. Step 4: Simplify right side
    256,060x = 150,255,466,384
  5. Step 5: Solve for x
    x = 150,255,466,384/256,060
  6. Step 6: Final answer
    x = 586,797.88

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.