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Finding the Fourth Proportional to 3,836,692.80, 5,755,039.20 and 3,672,878.40

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Solution

The fourth proportional to 3,836,692.80, 5,755,039.20 and 3,672,878.40 is: 5,509,317.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,836,692.80 : 5,755,039.20 = 3,672,878.40 : x
  2. Step 2: Convert to fraction form
    3,836,692.80/5,755,039.20 = 3,672,878.40/x
  3. Step 3: Cross multiply
    3,836,692.80x = 5,755,039.20 × 3,672,878.40
  4. Step 4: Simplify right side
    3,836,692.80x = 21,137,559,168,833.28
  5. Step 5: Solve for x
    x = 21,137,559,168,833.28/3,836,692.80
  6. Step 6: Final answer
    x = 5,509,317.60

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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.