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Finding the Fourth Proportional to 1,983.06, 2,974.71 and 942.87

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Solution

The fourth proportional to 1,983.06, 2,974.71 and 942.87 is: 1,414.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,983.06 : 2,974.71 = 942.87 : x
  2. Step 2: Convert to fraction form
    1,983.06/2,974.71 = 942.87/x
  3. Step 3: Cross multiply
    1,983.06x = 2,974.71 × 942.87
  4. Step 4: Simplify right side
    1,983.06x = 2,804,764.82
  5. Step 5: Solve for x
    x = 2,804,764.82/1,983.06
  6. Step 6: Final answer
    x = 1,414.36

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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.