Home / 3,078.80-4,609.56-1,921.04

Finding the Fourth Proportional to 3,078.80, 4,609.56 and 1,921.04

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Solution

The fourth proportional to 3,078.80, 4,609.56 and 1,921.04 is: 2,876.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,078.80 : 4,609.56 = 1,921.04 : x
  2. Step 2: Convert to fraction form
    3,078.80/4,609.56 = 1,921.04/x
  3. Step 3: Cross multiply
    3,078.80x = 4,609.56 × 1,921.04
  4. Step 4: Simplify right side
    3,078.80x = 8,855,149.14
  5. Step 5: Solve for x
    x = 8,855,149.14/3,078.80
  6. Step 6: Final answer
    x = 2,876.17

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1.5x scale

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.