Home / 2,639.91-3,961.23-1,915.46

Finding the Fourth Proportional to 2,639.91, 3,961.23 and 1,915.46

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Solution

The fourth proportional to 2,639.91, 3,961.23 and 1,915.46 is: 2,874.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,639.91 : 3,961.23 = 1,915.46 : x
  2. Step 2: Convert to fraction form
    2,639.91/3,961.23 = 1,915.46/x
  3. Step 3: Cross multiply
    2,639.91x = 3,961.23 × 1,915.46
  4. Step 4: Simplify right side
    2,639.91x = 7,587,577.62
  5. Step 5: Solve for x
    x = 7,587,577.62/2,639.91
  6. Step 6: Final answer
    x = 2,874.18

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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.