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Finding the Fourth Proportional to 638,449,939.55, 957,674,909.33 and 638,449,939.55

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Solution

The fourth proportional to 638,449,939.55, 957,674,909.33 and 638,449,939.55 is: 957,674,909.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,449,939.55 : 957,674,909.33 = 638,449,939.55 : x
  2. Step 2: Convert to fraction form
    638,449,939.55/957,674,909.33 = 638,449,939.55/x
  3. Step 3: Cross multiply
    638,449,939.55x = 957,674,909.33 × 638,449,939.55
  4. Step 4: Simplify right side
    638,449,939.55x = 611,427,487,970,290,176
  5. Step 5: Solve for x
    x = 611,427,487,970,290,176/638,449,939.55
  6. Step 6: Final answer
    x = 957,674,909.33

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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.