Home / 2,689.47-4,029.35-1,391.85

Finding the Fourth Proportional to 2,689.47, 4,029.35 and 1,391.85

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Solution

The fourth proportional to 2,689.47, 4,029.35 and 1,391.85 is: 2,085.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,689.47 : 4,029.35 = 1,391.85 : x
  2. Step 2: Convert to fraction form
    2,689.47/4,029.35 = 1,391.85/x
  3. Step 3: Cross multiply
    2,689.47x = 4,029.35 × 1,391.85
  4. Step 4: Simplify right side
    2,689.47x = 5,608,243.84
  5. Step 5: Solve for x
    x = 5,608,243.84/2,689.47
  6. Step 6: Final answer
    x = 2,085.26

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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.