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Finding the Fourth Proportional to 512,000.40, 768,000.60 and 290,816.40

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Solution

The fourth proportional to 512,000.40, 768,000.60 and 290,816.40 is: 436,224.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,000.40 : 768,000.60 = 290,816.40 : x
  2. Step 2: Convert to fraction form
    512,000.40/768,000.60 = 290,816.40/x
  3. Step 3: Cross multiply
    512,000.40x = 768,000.60 × 290,816.40
  4. Step 4: Simplify right side
    512,000.40x = 223,347,169,689.84
  5. Step 5: Solve for x
    x = 223,347,169,689.84/512,000.40
  6. Step 6: Final answer
    x = 436,224.60

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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.