Home / 2,689.68-4,032.88-1,107.90

Finding the Fourth Proportional to 2,689.68, 4,032.88 and 1,107.90

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Solution

The fourth proportional to 2,689.68, 4,032.88 and 1,107.90 is: 1,661.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,689.68 : 4,032.88 = 1,107.90 : x
  2. Step 2: Convert to fraction form
    2,689.68/4,032.88 = 1,107.90/x
  3. Step 3: Cross multiply
    2,689.68x = 4,032.88 × 1,107.90
  4. Step 4: Simplify right side
    2,689.68x = 4,468,007.59
  5. Step 5: Solve for x
    x = 4,468,007.59/2,689.68
  6. Step 6: Final answer
    x = 1,661.17

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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.