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Finding the Fourth Proportional to 665,000.40, 996,406.20 and 384,027.60

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Solution

The fourth proportional to 665,000.40, 996,406.20 and 384,027.60 is: 575,409.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,000.40 : 996,406.20 = 384,027.60 : x
  2. Step 2: Convert to fraction form
    665,000.40/996,406.20 = 384,027.60/x
  3. Step 3: Cross multiply
    665,000.40x = 996,406.20 × 384,027.60
  4. Step 4: Simplify right side
    665,000.40x = 382,647,481,611.12
  5. Step 5: Solve for x
    x = 382,647,481,611.12/665,000.40
  6. Step 6: Final answer
    x = 575,409.40

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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.