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Finding the Fourth Proportional to 256,628.28, 354,154.86 and 143,455.80

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Solution

The fourth proportional to 256,628.28, 354,154.86 and 143,455.80 is: 197,973.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,628.28 : 354,154.86 = 143,455.80 : x
  2. Step 2: Convert to fraction form
    256,628.28/354,154.86 = 143,455.80/x
  3. Step 3: Cross multiply
    256,628.28x = 354,154.86 × 143,455.80
  4. Step 4: Simplify right side
    256,628.28x = 50,805,568,765.19
  5. Step 5: Solve for x
    x = 50,805,568,765.19/256,628.28
  6. Step 6: Final answer
    x = 197,973.38

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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.