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Finding the Fourth Proportional to 674.72, 931.07 and 379.97

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Solution

The fourth proportional to 674.72, 931.07 and 379.97 is: 524.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.72 : 931.07 = 379.97 : x
  2. Step 2: Convert to fraction form
    674.72/931.07 = 379.97/x
  3. Step 3: Cross multiply
    674.72x = 931.07 × 379.97
  4. Step 4: Simplify right side
    674.72x = 353,781.95
  5. Step 5: Solve for x
    x = 353,781.95/674.72
  6. Step 6: Final answer
    x = 524.34

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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.