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Finding the Fourth Proportional to 2,785.82, 4,172.04 and 1,964.48

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Solution

The fourth proportional to 2,785.82, 4,172.04 and 1,964.48 is: 2,942.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,785.82 : 4,172.04 = 1,964.48 : x
  2. Step 2: Convert to fraction form
    2,785.82/4,172.04 = 1,964.48/x
  3. Step 3: Cross multiply
    2,785.82x = 4,172.04 × 1,964.48
  4. Step 4: Simplify right side
    2,785.82x = 8,195,868.28
  5. Step 5: Solve for x
    x = 8,195,868.28/2,785.82
  6. Step 6: Final answer
    x = 2,942.00

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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.