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Finding the Third Proportional to 256,212 and 407,126.25

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Solution

The third proportional to 256,212 and 407,126.25 is: 646,932.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,212 : 407,126.25 = 407,126.25 : x
  2. Step 2: Convert to fraction form
    256,212/407,126.25 = 407,126.25/x
  3. Step 3: Cross multiply
    256,212x = 407,126.25 × 407,126.25
  4. Step 4: Simplify right side
    256,212x = 165,751,783,439.06
  5. Step 5: Solve for x
    x = 165,751,783,439.06/256,212
  6. Step 6: Final answer
    x = 646,932.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.