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Finding the Fourth Proportional to 754.35, 1,136.67 and 620.39

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Solution

The fourth proportional to 754.35, 1,136.67 and 620.39 is: 934.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    754.35 : 1,136.67 = 620.39 : x
  2. Step 2: Convert to fraction form
    754.35/1,136.67 = 620.39/x
  3. Step 3: Cross multiply
    754.35x = 1,136.67 × 620.39
  4. Step 4: Simplify right side
    754.35x = 705,179.22
  5. Step 5: Solve for x
    x = 705,179.22/754.35
  6. Step 6: Final answer
    x = 934.82

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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.