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Finding the Third Proportional to 256,203 and 385,125

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Solution

The third proportional to 256,203 and 385,125 is: 578,920.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,203 : 385,125 = 385,125 : x
  2. Step 2: Convert to fraction form
    256,203/385,125 = 385,125/x
  3. Step 3: Cross multiply
    256,203x = 385,125 × 385,125
  4. Step 4: Simplify right side
    256,203x = 148,321,265,625
  5. Step 5: Solve for x
    x = 148,321,265,625/256,203
  6. Step 6: Final answer
    x = 578,920.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.