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Finding the Fourth Proportional to 3,390.48, 5,085 and 3,223.83

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Solution

The fourth proportional to 3,390.48, 5,085 and 3,223.83 is: 4,835.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,390.48 : 5,085 = 3,223.83 : x
  2. Step 2: Convert to fraction form
    3,390.48/5,085 = 3,223.83/x
  3. Step 3: Cross multiply
    3,390.48x = 5,085 × 3,223.83
  4. Step 4: Simplify right side
    3,390.48x = 16,393,175.55
  5. Step 5: Solve for x
    x = 16,393,175.55/3,390.48
  6. Step 6: Final answer
    x = 4,835.06

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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.