Home / 2,819.45-3,890.82-1,685.64

Finding the Fourth Proportional to 2,819.45, 3,890.82 and 1,685.64

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Solution

The fourth proportional to 2,819.45, 3,890.82 and 1,685.64 is: 2,326.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,819.45 : 3,890.82 = 1,685.64 : x
  2. Step 2: Convert to fraction form
    2,819.45/3,890.82 = 1,685.64/x
  3. Step 3: Cross multiply
    2,819.45x = 3,890.82 × 1,685.64
  4. Step 4: Simplify right side
    2,819.45x = 6,558,530.09
  5. Step 5: Solve for x
    x = 6,558,530.09/2,819.45
  6. Step 6: Final answer
    x = 2,326.17

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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.