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Finding the Fourth Proportional to 1,921.05, 2,881.94 and 622.53

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Solution

The fourth proportional to 1,921.05, 2,881.94 and 622.53 is: 933.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.05 : 2,881.94 = 622.53 : x
  2. Step 2: Convert to fraction form
    1,921.05/2,881.94 = 622.53/x
  3. Step 3: Cross multiply
    1,921.05x = 2,881.94 × 622.53
  4. Step 4: Simplify right side
    1,921.05x = 1,794,091.00
  5. Step 5: Solve for x
    x = 1,794,091.00/1,921.05
  6. Step 6: Final answer
    x = 933.91

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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.