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Finding the Fourth Proportional to 403.62, 605.22 and 186.96

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Solution

The fourth proportional to 403.62, 605.22 and 186.96 is: 280.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.62 : 605.22 = 186.96 : x
  2. Step 2: Convert to fraction form
    403.62/605.22 = 186.96/x
  3. Step 3: Cross multiply
    403.62x = 605.22 × 186.96
  4. Step 4: Simplify right side
    403.62x = 113,151.93
  5. Step 5: Solve for x
    x = 113,151.93/403.62
  6. Step 6: Final answer
    x = 280.34

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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.