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Finding the Fourth Proportional to 1,981.54, 2,974.74 and 1,879.48

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Solution

The fourth proportional to 1,981.54, 2,974.74 and 1,879.48 is: 2,821.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,981.54 : 2,974.74 = 1,879.48 : x
  2. Step 2: Convert to fraction form
    1,981.54/2,974.74 = 1,879.48/x
  3. Step 3: Cross multiply
    1,981.54x = 2,974.74 × 1,879.48
  4. Step 4: Simplify right side
    1,981.54x = 5,590,964.34
  5. Step 5: Solve for x
    x = 5,590,964.34/1,981.54
  6. Step 6: Final answer
    x = 2,821.52

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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.