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Finding the Fourth Proportional to 674.11, 930.21 and 379.34

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Solution

The fourth proportional to 674.11, 930.21 and 379.34 is: 523.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.11 : 930.21 = 379.34 : x
  2. Step 2: Convert to fraction form
    674.11/930.21 = 379.34/x
  3. Step 3: Cross multiply
    674.11x = 930.21 × 379.34
  4. Step 4: Simplify right side
    674.11x = 352,861.21
  5. Step 5: Solve for x
    x = 352,861.21/674.11
  6. Step 6: Final answer
    x = 523.45

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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.