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Finding the Fourth Proportional to 628,126,919.12, 866,821,563.11 and 345,895,605.25

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Solution

The fourth proportional to 628,126,919.12, 866,821,563.11 and 345,895,605.25 is: 477,339,467.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,126,919.12 : 866,821,563.11 = 345,895,605.25 : x
  2. Step 2: Convert to fraction form
    628,126,919.12/866,821,563.11 = 345,895,605.25/x
  3. Step 3: Cross multiply
    628,126,919.12x = 866,821,563.11 × 345,895,605.25
  4. Step 4: Simplify right side
    628,126,919.12x = 299,829,769,214,382,208
  5. Step 5: Solve for x
    x = 299,829,769,214,382,208/628,126,919.12
  6. Step 6: Final answer
    x = 477,339,467.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.