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Finding the Fourth Proportional to 2,886.85, 3,981.23 and 1,891.76

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Solution

The fourth proportional to 2,886.85, 3,981.23 and 1,891.76 is: 2,608.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,886.85 : 3,981.23 = 1,891.76 : x
  2. Step 2: Convert to fraction form
    2,886.85/3,981.23 = 1,891.76/x
  3. Step 3: Cross multiply
    2,886.85x = 3,981.23 × 1,891.76
  4. Step 4: Simplify right side
    2,886.85x = 7,531,531.66
  5. Step 5: Solve for x
    x = 7,531,531.66/2,886.85
  6. Step 6: Final answer
    x = 2,608.91

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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.