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Finding the Fourth Proportional to 3,961.40, 5,940.70 and 1,363.72

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Solution

The fourth proportional to 3,961.40, 5,940.70 and 1,363.72 is: 2,045.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,961.40 : 5,940.70 = 1,363.72 : x
  2. Step 2: Convert to fraction form
    3,961.40/5,940.70 = 1,363.72/x
  3. Step 3: Cross multiply
    3,961.40x = 5,940.70 × 1,363.72
  4. Step 4: Simplify right side
    3,961.40x = 8,101,451.40
  5. Step 5: Solve for x
    x = 8,101,451.40/3,961.40
  6. Step 6: Final answer
    x = 2,045.10

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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.