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Finding the Fourth Proportional to 2,891.71, 3,991.22 and 1,881.64

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Solution

The fourth proportional to 2,891.71, 3,991.22 and 1,881.64 is: 2,597.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,891.71 : 3,991.22 = 1,881.64 : x
  2. Step 2: Convert to fraction form
    2,891.71/3,991.22 = 1,881.64/x
  3. Step 3: Cross multiply
    2,891.71x = 3,991.22 × 1,881.64
  4. Step 4: Simplify right side
    2,891.71x = 7,510,020.87
  5. Step 5: Solve for x
    x = 7,510,020.87/2,891.71
  6. Step 6: Final answer
    x = 2,597.09

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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.