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Finding the Fourth Proportional to 629,856,817.60, 879,758,811.20 and 629,856,817.60

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Solution

The fourth proportional to 629,856,817.60, 879,758,811.20 and 629,856,817.60 is: 879,758,811.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,856,817.60 : 879,758,811.20 = 629,856,817.60 : x
  2. Step 2: Convert to fraction form
    629,856,817.60/879,758,811.20 = 629,856,817.60/x
  3. Step 3: Cross multiply
    629,856,817.60x = 879,758,811.20 × 629,856,817.60
  4. Step 4: Simplify right side
    629,856,817.60x = 554,122,085,077,991,296
  5. Step 5: Solve for x
    x = 554,122,085,077,991,296/629,856,817.60
  6. Step 6: Final answer
    x = 879,758,811.20

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.