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Finding the Fourth Proportional to 674.32, 930.36 and 394.48

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Solution

The fourth proportional to 674.32, 930.36 and 394.48 is: 544.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.32 : 930.36 = 394.48 : x
  2. Step 2: Convert to fraction form
    674.32/930.36 = 394.48/x
  3. Step 3: Cross multiply
    674.32x = 930.36 × 394.48
  4. Step 4: Simplify right side
    674.32x = 367,008.41
  5. Step 5: Solve for x
    x = 367,008.41/674.32
  6. Step 6: Final answer
    x = 544.26

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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.