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Finding the Fourth Proportional to 674.60, 930.95 and 371.78

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Solution

The fourth proportional to 674.60, 930.95 and 371.78 is: 513.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.60 : 930.95 = 371.78 : x
  2. Step 2: Convert to fraction form
    674.60/930.95 = 371.78/x
  3. Step 3: Cross multiply
    674.60x = 930.95 × 371.78
  4. Step 4: Simplify right side
    674.60x = 346,104.87
  5. Step 5: Solve for x
    x = 346,104.87/674.60
  6. Step 6: Final answer
    x = 513.06

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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.