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Finding the Fourth Proportional to 5,692.40, 8,522.40 and 4,385.60

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Solution

The fourth proportional to 5,692.40, 8,522.40 and 4,385.60 is: 6,565.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,692.40 : 8,522.40 = 4,385.60 : x
  2. Step 2: Convert to fraction form
    5,692.40/8,522.40 = 4,385.60/x
  3. Step 3: Cross multiply
    5,692.40x = 8,522.40 × 4,385.60
  4. Step 4: Simplify right side
    5,692.40x = 37,375,837.44
  5. Step 5: Solve for x
    x = 37,375,837.44/5,692.40
  6. Step 6: Final answer
    x = 6,565.92

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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.