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Finding the Fourth Proportional to 652,190.60, 978,285.90 and 439,614.20

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Solution

The fourth proportional to 652,190.60, 978,285.90 and 439,614.20 is: 659,421.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,190.60 : 978,285.90 = 439,614.20 : x
  2. Step 2: Convert to fraction form
    652,190.60/978,285.90 = 439,614.20/x
  3. Step 3: Cross multiply
    652,190.60x = 978,285.90 × 439,614.20
  4. Step 4: Simplify right side
    652,190.60x = 430,068,373,299.78
  5. Step 5: Solve for x
    x = 430,068,373,299.78/652,190.60
  6. Step 6: Final answer
    x = 659,421.30

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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.