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Finding the Fourth Proportional to 638,539,744.60, 957,809,616.90 and 638,539,744.60

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Solution

The fourth proportional to 638,539,744.60, 957,809,616.90 and 638,539,744.60 is: 957,809,616.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,539,744.60 : 957,809,616.90 = 638,539,744.60 : x
  2. Step 2: Convert to fraction form
    638,539,744.60/957,809,616.90 = 638,539,744.60/x
  3. Step 3: Cross multiply
    638,539,744.60x = 957,809,616.90 × 638,539,744.60
  4. Step 4: Simplify right side
    638,539,744.60x = 611,599,508,150,749,824
  5. Step 5: Solve for x
    x = 611,599,508,150,749,824/638,539,744.60
  6. Step 6: Final answer
    x = 957,809,616.90

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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.