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Finding the Fourth Proportional to 403.99, 605.22 and 273.35

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Solution

The fourth proportional to 403.99, 605.22 and 273.35 is: 409.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.99 : 605.22 = 273.35 : x
  2. Step 2: Convert to fraction form
    403.99/605.22 = 273.35/x
  3. Step 3: Cross multiply
    403.99x = 605.22 × 273.35
  4. Step 4: Simplify right side
    403.99x = 165,435.52
  5. Step 5: Solve for x
    x = 165,435.52/403.99
  6. Step 6: Final answer
    x = 409.50

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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.