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Finding the Fourth Proportional to 1,940.92, 2,911.34 and 480.07

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Solution

The fourth proportional to 1,940.92, 2,911.34 and 480.07 is: 720.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,940.92 : 2,911.34 = 480.07 : x
  2. Step 2: Convert to fraction form
    1,940.92/2,911.34 = 480.07/x
  3. Step 3: Cross multiply
    1,940.92x = 2,911.34 × 480.07
  4. Step 4: Simplify right side
    1,940.92x = 1,397,630.04
  5. Step 5: Solve for x
    x = 1,397,630.04/1,940.92
  6. Step 6: Final answer
    x = 720.09

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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.