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Finding the Fourth Proportional to 277.80, 415.89 and 216.99

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Solution

The fourth proportional to 277.80, 415.89 and 216.99 is: 324.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    277.80 : 415.89 = 216.99 : x
  2. Step 2: Convert to fraction form
    277.80/415.89 = 216.99/x
  3. Step 3: Cross multiply
    277.80x = 415.89 × 216.99
  4. Step 4: Simplify right side
    277.80x = 90,243.97
  5. Step 5: Solve for x
    x = 90,243.97/277.80
  6. Step 6: Final answer
    x = 324.85

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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.