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Finding the Fourth Proportional to 674.26, 930.43 and 379.47

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Solution

The fourth proportional to 674.26, 930.43 and 379.47 is: 523.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.26 : 930.43 = 379.47 : x
  2. Step 2: Convert to fraction form
    674.26/930.43 = 379.47/x
  3. Step 3: Cross multiply
    674.26x = 930.43 × 379.47
  4. Step 4: Simplify right side
    674.26x = 353,070.27
  5. Step 5: Solve for x
    x = 353,070.27/674.26
  6. Step 6: Final answer
    x = 523.64

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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.