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Finding the Fourth Proportional to 2,004.78, 3,011.53 and 1,939.17

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Solution

The fourth proportional to 2,004.78, 3,011.53 and 1,939.17 is: 2,912.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,004.78 : 3,011.53 = 1,939.17 : x
  2. Step 2: Convert to fraction form
    2,004.78/3,011.53 = 1,939.17/x
  3. Step 3: Cross multiply
    2,004.78x = 3,011.53 × 1,939.17
  4. Step 4: Simplify right side
    2,004.78x = 5,839,868.63
  5. Step 5: Solve for x
    x = 5,839,868.63/2,004.78
  6. Step 6: Final answer
    x = 2,912.97

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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.