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Finding the Fourth Proportional to 439.55, 605.85 and 308.33

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Solution

The fourth proportional to 439.55, 605.85 and 308.33 is: 424.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.55 : 605.85 = 308.33 : x
  2. Step 2: Convert to fraction form
    439.55/605.85 = 308.33/x
  3. Step 3: Cross multiply
    439.55x = 605.85 × 308.33
  4. Step 4: Simplify right side
    439.55x = 186,801.73
  5. Step 5: Solve for x
    x = 186,801.73/439.55
  6. Step 6: Final answer
    x = 424.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.