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Finding the Fourth Proportional to 507,942.80, 761,914.20 and 256,000.40

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Solution

The fourth proportional to 507,942.80, 761,914.20 and 256,000.40 is: 384,000.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    507,942.80 : 761,914.20 = 256,000.40 : x
  2. Step 2: Convert to fraction form
    507,942.80/761,914.20 = 256,000.40/x
  3. Step 3: Cross multiply
    507,942.80x = 761,914.20 × 256,000.40
  4. Step 4: Simplify right side
    507,942.80x = 195,050,339,965.68
  5. Step 5: Solve for x
    x = 195,050,339,965.68/507,942.80
  6. Step 6: Final answer
    x = 384,000.60

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Double scale
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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.