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Finding the Fourth Proportional to 638,246.40, 957,369.60 and 439,180.80

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Solution

The fourth proportional to 638,246.40, 957,369.60 and 439,180.80 is: 658,771.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,246.40 : 957,369.60 = 439,180.80 : x
  2. Step 2: Convert to fraction form
    638,246.40/957,369.60 = 439,180.80/x
  3. Step 3: Cross multiply
    638,246.40x = 957,369.60 × 439,180.80
  4. Step 4: Simplify right side
    638,246.40x = 420,458,346,823.68
  5. Step 5: Solve for x
    x = 420,458,346,823.68/638,246.40
  6. Step 6: Final answer
    x = 658,771.20

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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.