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Finding the Fourth Proportional to 674.29, 930.65 and 379.54

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Solution

The fourth proportional to 674.29, 930.65 and 379.54 is: 523.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.29 : 930.65 = 379.54 : x
  2. Step 2: Convert to fraction form
    674.29/930.65 = 379.54/x
  3. Step 3: Cross multiply
    674.29x = 930.65 × 379.54
  4. Step 4: Simplify right side
    674.29x = 353,218.90
  5. Step 5: Solve for x
    x = 353,218.90/674.29
  6. Step 6: Final answer
    x = 523.84

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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.