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Finding the Fourth Proportional to 1,857.75, 2,786.63 and 559.19

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Solution

The fourth proportional to 1,857.75, 2,786.63 and 559.19 is: 838.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,857.75 : 2,786.63 = 559.19 : x
  2. Step 2: Convert to fraction form
    1,857.75/2,786.63 = 559.19/x
  3. Step 3: Cross multiply
    1,857.75x = 2,786.63 × 559.19
  4. Step 4: Simplify right side
    1,857.75x = 1,558,238.90
  5. Step 5: Solve for x
    x = 1,558,238.90/1,857.75
  6. Step 6: Final answer
    x = 838.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.