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Finding the Fourth Proportional to 224.44, 309.78 and 155.56

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Solution

The fourth proportional to 224.44, 309.78 and 155.56 is: 214.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    224.44 : 309.78 = 155.56 : x
  2. Step 2: Convert to fraction form
    224.44/309.78 = 155.56/x
  3. Step 3: Cross multiply
    224.44x = 309.78 × 155.56
  4. Step 4: Simplify right side
    224.44x = 48,189.38
  5. Step 5: Solve for x
    x = 48,189.38/224.44
  6. Step 6: Final answer
    x = 214.71

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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.