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Finding the Fourth Proportional to 674.12, 930.26 and 394.38

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Solution

The fourth proportional to 674.12, 930.26 and 394.38 is: 544.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.12 : 930.26 = 394.38 : x
  2. Step 2: Convert to fraction form
    674.12/930.26 = 394.38/x
  3. Step 3: Cross multiply
    674.12x = 930.26 × 394.38
  4. Step 4: Simplify right side
    674.12x = 366,875.94
  5. Step 5: Solve for x
    x = 366,875.94/674.12
  6. Step 6: Final answer
    x = 544.23

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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.