Home / 2,768.80-4,152.30-919.60

Finding the Fourth Proportional to 2,768.80, 4,152.30 and 919.60

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Solution

The fourth proportional to 2,768.80, 4,152.30 and 919.60 is: 1,379.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,768.80 : 4,152.30 = 919.60 : x
  2. Step 2: Convert to fraction form
    2,768.80/4,152.30 = 919.60/x
  3. Step 3: Cross multiply
    2,768.80x = 4,152.30 × 919.60
  4. Step 4: Simplify right side
    2,768.80x = 3,818,455.08
  5. Step 5: Solve for x
    x = 3,818,455.08/2,768.80
  6. Step 6: Final answer
    x = 1,379.10

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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.