Home / 2,011.20-3,016.80-1,687.20

Finding the Fourth Proportional to 2,011.20, 3,016.80 and 1,687.20

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Solution

The fourth proportional to 2,011.20, 3,016.80 and 1,687.20 is: 2,530.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,011.20 : 3,016.80 = 1,687.20 : x
  2. Step 2: Convert to fraction form
    2,011.20/3,016.80 = 1,687.20/x
  3. Step 3: Cross multiply
    2,011.20x = 3,016.80 × 1,687.20
  4. Step 4: Simplify right side
    2,011.20x = 5,089,944.96
  5. Step 5: Solve for x
    x = 5,089,944.96/2,011.20
  6. Step 6: Final answer
    x = 2,530.80

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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.