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Finding the Fourth Proportional to 622,758,619.80, 934,137,929.70 and 393,435,048.60

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Solution

The fourth proportional to 622,758,619.80, 934,137,929.70 and 393,435,048.60 is: 590,152,572.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    622,758,619.80 : 934,137,929.70 = 393,435,048.60 : x
  2. Step 2: Convert to fraction form
    622,758,619.80/934,137,929.70 = 393,435,048.60/x
  3. Step 3: Cross multiply
    622,758,619.80x = 934,137,929.70 × 393,435,048.60
  4. Step 4: Simplify right side
    622,758,619.80x = 367,522,601,770,622,912
  5. Step 5: Solve for x
    x = 367,522,601,770,622,912/622,758,619.80
  6. Step 6: Final answer
    x = 590,152,572.90

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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.