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Finding the Fourth Proportional to 3,321.14, 4,971.18 and 1,855.86

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Solution

The fourth proportional to 3,321.14, 4,971.18 and 1,855.86 is: 2,777.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,321.14 : 4,971.18 = 1,855.86 : x
  2. Step 2: Convert to fraction form
    3,321.14/4,971.18 = 1,855.86/x
  3. Step 3: Cross multiply
    3,321.14x = 4,971.18 × 1,855.86
  4. Step 4: Simplify right side
    3,321.14x = 9,225,814.11
  5. Step 5: Solve for x
    x = 9,225,814.11/3,321.14
  6. Step 6: Final answer
    x = 2,777.91

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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.