Home / 2,872.40-3,963.82-1,613.68

Finding the Fourth Proportional to 2,872.40, 3,963.82 and 1,613.68

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Solution

The fourth proportional to 2,872.40, 3,963.82 and 1,613.68 is: 2,226.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,872.40 : 3,963.82 = 1,613.68 : x
  2. Step 2: Convert to fraction form
    2,872.40/3,963.82 = 1,613.68/x
  3. Step 3: Cross multiply
    2,872.40x = 3,963.82 × 1,613.68
  4. Step 4: Simplify right side
    2,872.40x = 6,396,337.06
  5. Step 5: Solve for x
    x = 6,396,337.06/2,872.40
  6. Step 6: Final answer
    x = 2,226.83

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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.