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Finding the Fourth Proportional to 3,889.80, 5,835.42 and 1,257.99

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Solution

The fourth proportional to 3,889.80, 5,835.42 and 1,257.99 is: 1,887.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,889.80 : 5,835.42 = 1,257.99 : x
  2. Step 2: Convert to fraction form
    3,889.80/5,835.42 = 1,257.99/x
  3. Step 3: Cross multiply
    3,889.80x = 5,835.42 × 1,257.99
  4. Step 4: Simplify right side
    3,889.80x = 7,340,900.01
  5. Step 5: Solve for x
    x = 7,340,900.01/3,889.80
  6. Step 6: Final answer
    x = 1,887.22

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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.