Home / 2,767.90-4,151.99-919.20

Finding the Fourth Proportional to 2,767.90, 4,151.99 and 919.20

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Solution

The fourth proportional to 2,767.90, 4,151.99 and 919.20 is: 1,378.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,767.90 : 4,151.99 = 919.20 : x
  2. Step 2: Convert to fraction form
    2,767.90/4,151.99 = 919.20/x
  3. Step 3: Cross multiply
    2,767.90x = 4,151.99 × 919.20
  4. Step 4: Simplify right side
    2,767.90x = 3,816,509.21
  5. Step 5: Solve for x
    x = 3,816,509.21/2,767.90
  6. Step 6: Final answer
    x = 1,378.85

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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.