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Finding the Fourth Proportional to 3,855.98, 5,782.66 and 1,258.31

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Solution

The fourth proportional to 3,855.98, 5,782.66 and 1,258.31 is: 1,887.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,855.98 : 5,782.66 = 1,258.31 : x
  2. Step 2: Convert to fraction form
    3,855.98/5,782.66 = 1,258.31/x
  3. Step 3: Cross multiply
    3,855.98x = 5,782.66 × 1,258.31
  4. Step 4: Simplify right side
    3,855.98x = 7,276,390.22
  5. Step 5: Solve for x
    x = 7,276,390.22/3,855.98
  6. Step 6: Final answer
    x = 1,887.04

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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.