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Finding the Fourth Proportional to 3,910.62, 5,865.94 and 988.92

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Solution

The fourth proportional to 3,910.62, 5,865.94 and 988.92 is: 1,483.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,910.62 : 5,865.94 = 988.92 : x
  2. Step 2: Convert to fraction form
    3,910.62/5,865.94 = 988.92/x
  3. Step 3: Cross multiply
    3,910.62x = 5,865.94 × 988.92
  4. Step 4: Simplify right side
    3,910.62x = 5,800,945.38
  5. Step 5: Solve for x
    x = 5,800,945.38/3,910.62
  6. Step 6: Final answer
    x = 1,483.38

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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.