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Finding the Fourth Proportional to 773.96, 1,161.04 and 408.77

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Solution

The fourth proportional to 773.96, 1,161.04 and 408.77 is: 613.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    773.96 : 1,161.04 = 408.77 : x
  2. Step 2: Convert to fraction form
    773.96/1,161.04 = 408.77/x
  3. Step 3: Cross multiply
    773.96x = 1,161.04 × 408.77
  4. Step 4: Simplify right side
    773.96x = 474,591.49
  5. Step 5: Solve for x
    x = 474,591.49/773.96
  6. Step 6: Final answer
    x = 613.20

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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.