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Finding the Fourth Proportional to 754.28, 1,136.56 and 620.33

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Solution

The fourth proportional to 754.28, 1,136.56 and 620.33 is: 934.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    754.28 : 1,136.56 = 620.33 : x
  2. Step 2: Convert to fraction form
    754.28/1,136.56 = 620.33/x
  3. Step 3: Cross multiply
    754.28x = 1,136.56 × 620.33
  4. Step 4: Simplify right side
    754.28x = 705,035.03
  5. Step 5: Solve for x
    x = 705,035.03/754.28
  6. Step 6: Final answer
    x = 934.71

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.