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Finding the Fourth Proportional to 277.20, 414.90 and 225

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Solution

The fourth proportional to 277.20, 414.90 and 225 is: 336.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    277.20 : 414.90 = 225 : x
  2. Step 2: Convert to fraction form
    277.20/414.90 = 225/x
  3. Step 3: Cross multiply
    277.20x = 414.90 × 225
  4. Step 4: Simplify right side
    277.20x = 93,352.50
  5. Step 5: Solve for x
    x = 93,352.50/277.20
  6. Step 6: Final answer
    x = 336.77

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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.