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Finding the Fourth Proportional to 5,321.72, 7,982.46 and 1,858.88

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Solution

The fourth proportional to 5,321.72, 7,982.46 and 1,858.88 is: 2,788.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,321.72 : 7,982.46 = 1,858.88 : x
  2. Step 2: Convert to fraction form
    5,321.72/7,982.46 = 1,858.88/x
  3. Step 3: Cross multiply
    5,321.72x = 7,982.46 × 1,858.88
  4. Step 4: Simplify right side
    5,321.72x = 14,838,395.33
  5. Step 5: Solve for x
    x = 14,838,395.33/5,321.72
  6. Step 6: Final answer
    x = 2,788.27

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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.