Home / 2,268.50-3,120.81-2,171.30

Finding the Fourth Proportional to 2,268.50, 3,120.81 and 2,171.30

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Solution

The fourth proportional to 2,268.50, 3,120.81 and 2,171.30 is: 2,987.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,268.50 : 3,120.81 = 2,171.30 : x
  2. Step 2: Convert to fraction form
    2,268.50/3,120.81 = 2,171.30/x
  3. Step 3: Cross multiply
    2,268.50x = 3,120.81 × 2,171.30
  4. Step 4: Simplify right side
    2,268.50x = 6,776,214.75
  5. Step 5: Solve for x
    x = 6,776,214.75/2,268.50
  6. Step 6: Final answer
    x = 2,987.09

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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.