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Finding the Fourth Proportional to 3,954.48, 5,928.56 and 1,980.80

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Solution

The fourth proportional to 3,954.48, 5,928.56 and 1,980.80 is: 2,969.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,954.48 : 5,928.56 = 1,980.80 : x
  2. Step 2: Convert to fraction form
    3,954.48/5,928.56 = 1,980.80/x
  3. Step 3: Cross multiply
    3,954.48x = 5,928.56 × 1,980.80
  4. Step 4: Simplify right side
    3,954.48x = 11,743,291.65
  5. Step 5: Solve for x
    x = 11,743,291.65/3,954.48
  6. Step 6: Final answer
    x = 2,969.62

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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.