Home / 2,879.78-3,974.19-1,621.08

Finding the Fourth Proportional to 2,879.78, 3,974.19 and 1,621.08

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Solution

The fourth proportional to 2,879.78, 3,974.19 and 1,621.08 is: 2,237.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,879.78 : 3,974.19 = 1,621.08 : x
  2. Step 2: Convert to fraction form
    2,879.78/3,974.19 = 1,621.08/x
  3. Step 3: Cross multiply
    2,879.78x = 3,974.19 × 1,621.08
  4. Step 4: Simplify right side
    2,879.78x = 6,442,461.64
  5. Step 5: Solve for x
    x = 6,442,461.64/2,879.78
  6. Step 6: Final answer
    x = 2,237.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.