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Finding the Fourth Proportional to 1,940.92, 2,910.86 and 1,324.50

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Solution

The fourth proportional to 1,940.92, 2,910.86 and 1,324.50 is: 1,986.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,940.92 : 2,910.86 = 1,324.50 : x
  2. Step 2: Convert to fraction form
    1,940.92/2,910.86 = 1,324.50/x
  3. Step 3: Cross multiply
    1,940.92x = 2,910.86 × 1,324.50
  4. Step 4: Simplify right side
    1,940.92x = 3,855,434.07
  5. Step 5: Solve for x
    x = 3,855,434.07/1,940.92
  6. Step 6: Final answer
    x = 1,986.40

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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.