Home / 2,812.27-4,218.81-864.64

Finding the Fourth Proportional to 2,812.27, 4,218.81 and 864.64

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Solution

The fourth proportional to 2,812.27, 4,218.81 and 864.64 is: 1,297.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,812.27 : 4,218.81 = 864.64 : x
  2. Step 2: Convert to fraction form
    2,812.27/4,218.81 = 864.64/x
  3. Step 3: Cross multiply
    2,812.27x = 4,218.81 × 864.64
  4. Step 4: Simplify right side
    2,812.27x = 3,647,751.88
  5. Step 5: Solve for x
    x = 3,647,751.88/2,812.27
  6. Step 6: Final answer
    x = 1,297.08

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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.