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Finding the Fourth Proportional to 607,711.20, 911,566.80 and 439,749.60

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Solution

The fourth proportional to 607,711.20, 911,566.80 and 439,749.60 is: 659,624.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    607,711.20 : 911,566.80 = 439,749.60 : x
  2. Step 2: Convert to fraction form
    607,711.20/911,566.80 = 439,749.60/x
  3. Step 3: Cross multiply
    607,711.20x = 911,566.80 × 439,749.60
  4. Step 4: Simplify right side
    607,711.20x = 400,861,135,673.28
  5. Step 5: Solve for x
    x = 400,861,135,673.28/607,711.20
  6. Step 6: Final answer
    x = 659,624.40

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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.