Home / 2,171.20-3,256.80-1,739.20

Finding the Fourth Proportional to 2,171.20, 3,256.80 and 1,739.20

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Solution

The fourth proportional to 2,171.20, 3,256.80 and 1,739.20 is: 2,608.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,171.20 : 3,256.80 = 1,739.20 : x
  2. Step 2: Convert to fraction form
    2,171.20/3,256.80 = 1,739.20/x
  3. Step 3: Cross multiply
    2,171.20x = 3,256.80 × 1,739.20
  4. Step 4: Simplify right side
    2,171.20x = 5,664,226.56
  5. Step 5: Solve for x
    x = 5,664,226.56/2,171.20
  6. Step 6: Final answer
    x = 2,608.80

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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.