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Finding the Fourth Proportional to 2,819.01, 3,888.67 and 1,639.95

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Solution

The fourth proportional to 2,819.01, 3,888.67 and 1,639.95 is: 2,262.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,819.01 : 3,888.67 = 1,639.95 : x
  2. Step 2: Convert to fraction form
    2,819.01/3,888.67 = 1,639.95/x
  3. Step 3: Cross multiply
    2,819.01x = 3,888.67 × 1,639.95
  4. Step 4: Simplify right side
    2,819.01x = 6,377,224.37
  5. Step 5: Solve for x
    x = 6,377,224.37/2,819.01
  6. Step 6: Final answer
    x = 2,262.22

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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.