Home / 2,629.12-3,940.88-1,977.84

Finding the Fourth Proportional to 2,629.12, 3,940.88 and 1,977.84

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Solution

The fourth proportional to 2,629.12, 3,940.88 and 1,977.84 is: 2,964.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,629.12 : 3,940.88 = 1,977.84 : x
  2. Step 2: Convert to fraction form
    2,629.12/3,940.88 = 1,977.84/x
  3. Step 3: Cross multiply
    2,629.12x = 3,940.88 × 1,977.84
  4. Step 4: Simplify right side
    2,629.12x = 7,794,430.10
  5. Step 5: Solve for x
    x = 7,794,430.10/2,629.12
  6. Step 6: Final answer
    x = 2,964.65

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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.