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Finding the Fourth Proportional to 256,853.87, 354,439.08 and 143,654.75

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Solution

The fourth proportional to 256,853.87, 354,439.08 and 143,654.75 is: 198,232.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,853.87 : 354,439.08 = 143,654.75 : x
  2. Step 2: Convert to fraction form
    256,853.87/354,439.08 = 143,654.75/x
  3. Step 3: Cross multiply
    256,853.87x = 354,439.08 × 143,654.75
  4. Step 4: Simplify right side
    256,853.87x = 50,916,857,427.63
  5. Step 5: Solve for x
    x = 50,916,857,427.63/256,853.87
  6. Step 6: Final answer
    x = 198,232.78

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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.