Home / 1,879.78-2,816.46-1,331.05

Finding the Fourth Proportional to 1,879.78, 2,816.46 and 1,331.05

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Solution

The fourth proportional to 1,879.78, 2,816.46 and 1,331.05 is: 1,994.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,879.78 : 2,816.46 = 1,331.05 : x
  2. Step 2: Convert to fraction form
    1,879.78/2,816.46 = 1,331.05/x
  3. Step 3: Cross multiply
    1,879.78x = 2,816.46 × 1,331.05
  4. Step 4: Simplify right side
    1,879.78x = 3,748,849.08
  5. Step 5: Solve for x
    x = 3,748,849.08/1,879.78
  6. Step 6: Final answer
    x = 1,994.30

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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.