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Finding the Fourth Proportional to 674.18, 930.31 and 379.38

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Solution

The fourth proportional to 674.18, 930.31 and 379.38 is: 523.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.18 : 930.31 = 379.38 : x
  2. Step 2: Convert to fraction form
    674.18/930.31 = 379.38/x
  3. Step 3: Cross multiply
    674.18x = 930.31 × 379.38
  4. Step 4: Simplify right side
    674.18x = 352,943.55
  5. Step 5: Solve for x
    x = 352,943.55/674.18
  6. Step 6: Final answer
    x = 523.52

Related Problems

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Double scale
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1.5x scale

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.