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Finding the Fourth Proportional to 2,008.75, 3,013.40 and 692.64

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Solution

The fourth proportional to 2,008.75, 3,013.40 and 692.64 is: 1,039.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,008.75 : 3,013.40 = 692.64 : x
  2. Step 2: Convert to fraction form
    2,008.75/3,013.40 = 692.64/x
  3. Step 3: Cross multiply
    2,008.75x = 3,013.40 × 692.64
  4. Step 4: Simplify right side
    2,008.75x = 2,087,201.38
  5. Step 5: Solve for x
    x = 2,087,201.38/2,008.75
  6. Step 6: Final answer
    x = 1,039.05

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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.