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Finding the Fourth Proportional to 2,883.78, 4,007.21 and 2,853.72

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Solution

The fourth proportional to 2,883.78, 4,007.21 and 2,853.72 is: 3,965.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,883.78 : 4,007.21 = 2,853.72 : x
  2. Step 2: Convert to fraction form
    2,883.78/4,007.21 = 2,853.72/x
  3. Step 3: Cross multiply
    2,883.78x = 4,007.21 × 2,853.72
  4. Step 4: Simplify right side
    2,883.78x = 11,435,441.05
  5. Step 5: Solve for x
    x = 11,435,441.05/2,883.78
  6. Step 6: Final answer
    x = 3,965.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.