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Finding the Fourth Proportional to 224.98, 310.42 and 155.09

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Solution

The fourth proportional to 224.98, 310.42 and 155.09 is: 213.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    224.98 : 310.42 = 155.09 : x
  2. Step 2: Convert to fraction form
    224.98/310.42 = 155.09/x
  3. Step 3: Cross multiply
    224.98x = 310.42 × 155.09
  4. Step 4: Simplify right side
    224.98x = 48,143.04
  5. Step 5: Solve for x
    x = 48,143.04/224.98
  6. Step 6: Final answer
    x = 213.99

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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.