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Finding the Fourth Proportional to 256,577.20, 384,865.80 and 190,311.10

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Solution

The fourth proportional to 256,577.20, 384,865.80 and 190,311.10 is: 285,466.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,577.20 : 384,865.80 = 190,311.10 : x
  2. Step 2: Convert to fraction form
    256,577.20/384,865.80 = 190,311.10/x
  3. Step 3: Cross multiply
    256,577.20x = 384,865.80 × 190,311.10
  4. Step 4: Simplify right side
    256,577.20x = 73,244,233,750.38
  5. Step 5: Solve for x
    x = 73,244,233,750.38/256,577.20
  6. Step 6: Final answer
    x = 285,466.65

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Similar ratio
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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.