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Finding the Fourth Proportional to 674.12, 930.05 and 379.32

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Solution

The fourth proportional to 674.12, 930.05 and 379.32 is: 523.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.12 : 930.05 = 379.32 : x
  2. Step 2: Convert to fraction form
    674.12/930.05 = 379.32/x
  3. Step 3: Cross multiply
    674.12x = 930.05 × 379.32
  4. Step 4: Simplify right side
    674.12x = 352,782.60
  5. Step 5: Solve for x
    x = 352,782.60/674.12
  6. Step 6: Final answer
    x = 523.32

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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.