Home / 2,645.85-3,651.66-1,638.12

Finding the Fourth Proportional to 2,645.85, 3,651.66 and 1,638.12

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Solution

The fourth proportional to 2,645.85, 3,651.66 and 1,638.12 is: 2,260.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,645.85 : 3,651.66 = 1,638.12 : x
  2. Step 2: Convert to fraction form
    2,645.85/3,651.66 = 1,638.12/x
  3. Step 3: Cross multiply
    2,645.85x = 3,651.66 × 1,638.12
  4. Step 4: Simplify right side
    2,645.85x = 5,981,857.28
  5. Step 5: Solve for x
    x = 5,981,857.28/2,645.85
  6. Step 6: Final answer
    x = 2,260.85

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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.