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Finding the Fourth Proportional to 1,396.62, 2,096.21 and 1,391.39

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Solution

The fourth proportional to 1,396.62, 2,096.21 and 1,391.39 is: 2,088.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,396.62 : 2,096.21 = 1,391.39 : x
  2. Step 2: Convert to fraction form
    1,396.62/2,096.21 = 1,391.39/x
  3. Step 3: Cross multiply
    1,396.62x = 2,096.21 × 1,391.39
  4. Step 4: Simplify right side
    1,396.62x = 2,916,645.63
  5. Step 5: Solve for x
    x = 2,916,645.63/1,396.62
  6. Step 6: Final answer
    x = 2,088.36

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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.