Home / 2,311.25-3,467.21-667.81

Finding the Fourth Proportional to 2,311.25, 3,467.21 and 667.81

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Solution

The fourth proportional to 2,311.25, 3,467.21 and 667.81 is: 1,001.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,311.25 : 3,467.21 = 667.81 : x
  2. Step 2: Convert to fraction form
    2,311.25/3,467.21 = 667.81/x
  3. Step 3: Cross multiply
    2,311.25x = 3,467.21 × 667.81
  4. Step 4: Simplify right side
    2,311.25x = 2,315,437.51
  5. Step 5: Solve for x
    x = 2,315,437.51/2,311.25
  6. Step 6: Final answer
    x = 1,001.81

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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.