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Finding the Fourth Proportional to 2,889.87, 3,987.92 and 1,630.96

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Solution

The fourth proportional to 2,889.87, 3,987.92 and 1,630.96 is: 2,250.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,889.87 : 3,987.92 = 1,630.96 : x
  2. Step 2: Convert to fraction form
    2,889.87/3,987.92 = 1,630.96/x
  3. Step 3: Cross multiply
    2,889.87x = 3,987.92 × 1,630.96
  4. Step 4: Simplify right side
    2,889.87x = 6,504,118.06
  5. Step 5: Solve for x
    x = 6,504,118.06/2,889.87
  6. Step 6: Final answer
    x = 2,250.66

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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.