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Finding the Fourth Proportional to 224.45, 336.91 and 138

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Solution

The fourth proportional to 224.45, 336.91 and 138 is: 207.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    224.45 : 336.91 = 138 : x
  2. Step 2: Convert to fraction form
    224.45/336.91 = 138/x
  3. Step 3: Cross multiply
    224.45x = 336.91 × 138
  4. Step 4: Simplify right side
    224.45x = 46,493.58
  5. Step 5: Solve for x
    x = 46,493.58/224.45
  6. Step 6: Final answer
    x = 207.14

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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.