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Finding the Fourth Proportional to 256,825.20, 385,698.60 and 186,783.60

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Solution

The fourth proportional to 256,825.20, 385,698.60 and 186,783.60 is: 280,510.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,825.20 : 385,698.60 = 186,783.60 : x
  2. Step 2: Convert to fraction form
    256,825.20/385,698.60 = 186,783.60/x
  3. Step 3: Cross multiply
    256,825.20x = 385,698.60 × 186,783.60
  4. Step 4: Simplify right side
    256,825.20x = 72,042,173,022.96
  5. Step 5: Solve for x
    x = 72,042,173,022.96/256,825.20
  6. Step 6: Final answer
    x = 280,510.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.