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Finding the Fourth Proportional to 1,396.06, 2,092.16 and 614.89

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Solution

The fourth proportional to 1,396.06, 2,092.16 and 614.89 is: 921.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,396.06 : 2,092.16 = 614.89 : x
  2. Step 2: Convert to fraction form
    1,396.06/2,092.16 = 614.89/x
  3. Step 3: Cross multiply
    1,396.06x = 2,092.16 × 614.89
  4. Step 4: Simplify right side
    1,396.06x = 1,286,456.57
  5. Step 5: Solve for x
    x = 1,286,456.57/1,396.06
  6. Step 6: Final answer
    x = 921.49

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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.