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Finding the Fourth Proportional to 619,720.40, 929,580.60 and 220,811.60

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Solution

The fourth proportional to 619,720.40, 929,580.60 and 220,811.60 is: 331,217.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,720.40 : 929,580.60 = 220,811.60 : x
  2. Step 2: Convert to fraction form
    619,720.40/929,580.60 = 220,811.60/x
  3. Step 3: Cross multiply
    619,720.40x = 929,580.60 × 220,811.60
  4. Step 4: Simplify right side
    619,720.40x = 205,262,179,614.96
  5. Step 5: Solve for x
    x = 205,262,179,614.96/619,720.40
  6. Step 6: Final answer
    x = 331,217.40

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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.