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Finding the Fourth Proportional to 674.30, 930.56 and 379.56

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Solution

The fourth proportional to 674.30, 930.56 and 379.56 is: 523.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.30 : 930.56 = 379.56 : x
  2. Step 2: Convert to fraction form
    674.30/930.56 = 379.56/x
  3. Step 3: Cross multiply
    674.30x = 930.56 × 379.56
  4. Step 4: Simplify right side
    674.30x = 353,204.95
  5. Step 5: Solve for x
    x = 353,204.95/674.30
  6. Step 6: Final answer
    x = 523.81

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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.