Home / 2,301.20-3,181.80-2,009.60

Finding the Fourth Proportional to 2,301.20, 3,181.80 and 2,009.60

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Solution

The fourth proportional to 2,301.20, 3,181.80 and 2,009.60 is: 2,778.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,301.20 : 3,181.80 = 2,009.60 : x
  2. Step 2: Convert to fraction form
    2,301.20/3,181.80 = 2,009.60/x
  3. Step 3: Cross multiply
    2,301.20x = 3,181.80 × 2,009.60
  4. Step 4: Simplify right side
    2,301.20x = 6,394,145.28
  5. Step 5: Solve for x
    x = 6,394,145.28/2,301.20
  6. Step 6: Final answer
    x = 2,778.61

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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.