Home / 2,639.30-3,642.84-1,520.91

Finding the Fourth Proportional to 2,639.30, 3,642.84 and 1,520.91

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Solution

The fourth proportional to 2,639.30, 3,642.84 and 1,520.91 is: 2,099.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,639.30 : 3,642.84 = 1,520.91 : x
  2. Step 2: Convert to fraction form
    2,639.30/3,642.84 = 1,520.91/x
  3. Step 3: Cross multiply
    2,639.30x = 3,642.84 × 1,520.91
  4. Step 4: Simplify right side
    2,639.30x = 5,540,431.78
  5. Step 5: Solve for x
    x = 5,540,431.78/2,639.30
  6. Step 6: Final answer
    x = 2,099.21

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1.5x scale

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.