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Finding the Fourth Proportional to 674.03, 930.21 and 379.39

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Solution

The fourth proportional to 674.03, 930.21 and 379.39 is: 523.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.03 : 930.21 = 379.39 : x
  2. Step 2: Convert to fraction form
    674.03/930.21 = 379.39/x
  3. Step 3: Cross multiply
    674.03x = 930.21 × 379.39
  4. Step 4: Simplify right side
    674.03x = 352,912.37
  5. Step 5: Solve for x
    x = 352,912.37/674.03
  6. Step 6: Final answer
    x = 523.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.