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Finding the Fourth Proportional to 224.78, 310.32 and 154.88

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Solution

The fourth proportional to 224.78, 310.32 and 154.88 is: 213.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    224.78 : 310.32 = 154.88 : x
  2. Step 2: Convert to fraction form
    224.78/310.32 = 154.88/x
  3. Step 3: Cross multiply
    224.78x = 310.32 × 154.88
  4. Step 4: Simplify right side
    224.78x = 48,062.36
  5. Step 5: Solve for x
    x = 48,062.36/224.78
  6. Step 6: Final answer
    x = 213.82

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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.