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Finding the Fourth Proportional to 2,819.63, 3,891.22 and 1,624.79

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Solution

The fourth proportional to 2,819.63, 3,891.22 and 1,624.79 is: 2,242.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,819.63 : 3,891.22 = 1,624.79 : x
  2. Step 2: Convert to fraction form
    2,819.63/3,891.22 = 1,624.79/x
  3. Step 3: Cross multiply
    2,819.63x = 3,891.22 × 1,624.79
  4. Step 4: Simplify right side
    2,819.63x = 6,322,426.66
  5. Step 5: Solve for x
    x = 6,322,426.66/2,819.63
  6. Step 6: Final answer
    x = 2,242.29

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1.5x scale

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.