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Finding the Fourth Proportional to 793.53, 1,191.78 and 486

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Solution

The fourth proportional to 793.53, 1,191.78 and 486 is: 729.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    793.53 : 1,191.78 = 486 : x
  2. Step 2: Convert to fraction form
    793.53/1,191.78 = 486/x
  3. Step 3: Cross multiply
    793.53x = 1,191.78 × 486
  4. Step 4: Simplify right side
    793.53x = 579,205.08
  5. Step 5: Solve for x
    x = 579,205.08/793.53
  6. Step 6: Final answer
    x = 729.91

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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.