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Finding the Fourth Proportional to 256,571.30, 354,060.78 and 143,393.78

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Solution

The fourth proportional to 256,571.30, 354,060.78 and 143,393.78 is: 197,879.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,571.30 : 354,060.78 = 143,393.78 : x
  2. Step 2: Convert to fraction form
    256,571.30/354,060.78 = 143,393.78/x
  3. Step 3: Cross multiply
    256,571.30x = 354,060.78 × 143,393.78
  4. Step 4: Simplify right side
    256,571.30x = 50,770,113,593.95
  5. Step 5: Solve for x
    x = 50,770,113,593.95/256,571.30
  6. Step 6: Final answer
    x = 197,879.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.