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Finding the Fourth Proportional to 3,859.88, 5,326.63 and 2,091.51

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Solution

The fourth proportional to 3,859.88, 5,326.63 and 2,091.51 is: 2,886.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,859.88 : 5,326.63 = 2,091.51 : x
  2. Step 2: Convert to fraction form
    3,859.88/5,326.63 = 2,091.51/x
  3. Step 3: Cross multiply
    3,859.88x = 5,326.63 × 2,091.51
  4. Step 4: Simplify right side
    3,859.88x = 11,140,694.68
  5. Step 5: Solve for x
    x = 11,140,694.68/3,859.88
  6. Step 6: Final answer
    x = 2,886.28

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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.