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Finding the Fourth Proportional to 793.92, 1,191.28 and 361

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Solution

The fourth proportional to 793.92, 1,191.28 and 361 is: 541.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    793.92 : 1,191.28 = 361 : x
  2. Step 2: Convert to fraction form
    793.92/1,191.28 = 361/x
  3. Step 3: Cross multiply
    793.92x = 1,191.28 × 361
  4. Step 4: Simplify right side
    793.92x = 430,052.08
  5. Step 5: Solve for x
    x = 430,052.08/793.92
  6. Step 6: Final answer
    x = 541.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.