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Finding the Fourth Proportional to 674.08, 930.12 and 394.36

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Solution

The fourth proportional to 674.08, 930.12 and 394.36 is: 544.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.08 : 930.12 = 394.36 : x
  2. Step 2: Convert to fraction form
    674.08/930.12 = 394.36/x
  3. Step 3: Cross multiply
    674.08x = 930.12 × 394.36
  4. Step 4: Simplify right side
    674.08x = 366,802.12
  5. Step 5: Solve for x
    x = 366,802.12/674.08
  6. Step 6: Final answer
    x = 544.15

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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.