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Finding the Fourth Proportional to 422,640,915.80, 590,487,958.60 and 422,640,915.80

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Solution

The fourth proportional to 422,640,915.80, 590,487,958.60 and 422,640,915.80 is: 590,487,958.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,640,915.80 : 590,487,958.60 = 422,640,915.80 : x
  2. Step 2: Convert to fraction form
    422,640,915.80/590,487,958.60 = 422,640,915.80/x
  3. Step 3: Cross multiply
    422,640,915.80x = 590,487,958.60 × 422,640,915.80
  4. Step 4: Simplify right side
    422,640,915.80x = 249,564,371,591,576,512
  5. Step 5: Solve for x
    x = 249,564,371,591,576,512/422,640,915.80
  6. Step 6: Final answer
    x = 590,487,958.60

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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.