Home / 2,642.75-3,961.90-1,324.88

Finding the Fourth Proportional to 2,642.75, 3,961.90 and 1,324.88

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Solution

The fourth proportional to 2,642.75, 3,961.90 and 1,324.88 is: 1,986.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,642.75 : 3,961.90 = 1,324.88 : x
  2. Step 2: Convert to fraction form
    2,642.75/3,961.90 = 1,324.88/x
  3. Step 3: Cross multiply
    2,642.75x = 3,961.90 × 1,324.88
  4. Step 4: Simplify right side
    2,642.75x = 5,249,053.63
  5. Step 5: Solve for x
    x = 5,249,053.63/2,642.75
  6. Step 6: Final answer
    x = 1,986.21

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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.