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Finding the Fourth Proportional to 2,886.60, 3,983.40 and 1,891.92

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Solution

The fourth proportional to 2,886.60, 3,983.40 and 1,891.92 is: 2,610.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,886.60 : 3,983.40 = 1,891.92 : x
  2. Step 2: Convert to fraction form
    2,886.60/3,983.40 = 1,891.92/x
  3. Step 3: Cross multiply
    2,886.60x = 3,983.40 × 1,891.92
  4. Step 4: Simplify right side
    2,886.60x = 7,536,274.13
  5. Step 5: Solve for x
    x = 7,536,274.13/2,886.60
  6. Step 6: Final answer
    x = 2,610.78

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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.