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Finding the Fourth Proportional to 256,599.76, 354,115.40 and 143,419.60

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Solution

The fourth proportional to 256,599.76, 354,115.40 and 143,419.60 is: 197,923.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,599.76 : 354,115.40 = 143,419.60 : x
  2. Step 2: Convert to fraction form
    256,599.76/354,115.40 = 143,419.60/x
  3. Step 3: Cross multiply
    256,599.76x = 354,115.40 × 143,419.60
  4. Step 4: Simplify right side
    256,599.76x = 50,787,089,021.84
  5. Step 5: Solve for x
    x = 50,787,089,021.84/256,599.76
  6. Step 6: Final answer
    x = 197,923.37

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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.