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Finding the Fourth Proportional to 666,628,763.12, 920,266,694.17 and 443,980,965.68

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Solution

The fourth proportional to 666,628,763.12, 920,266,694.17 and 443,980,965.68 is: 612,906,190.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,628,763.12 : 920,266,694.17 = 443,980,965.68 : x
  2. Step 2: Convert to fraction form
    666,628,763.12/920,266,694.17 = 443,980,965.68/x
  3. Step 3: Cross multiply
    666,628,763.12x = 920,266,694.17 × 443,980,965.68
  4. Step 4: Simplify right side
    666,628,763.12x = 408,580,895,555,026,560
  5. Step 5: Solve for x
    x = 408,580,895,555,026,560/666,628,763.12
  6. Step 6: Final answer
    x = 612,906,190.31

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1.5x scale

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.