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Finding the Fourth Proportional to 224.45, 336.64 and 137.75

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Solution

The fourth proportional to 224.45, 336.64 and 137.75 is: 206.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    224.45 : 336.64 = 137.75 : x
  2. Step 2: Convert to fraction form
    224.45/336.64 = 137.75/x
  3. Step 3: Cross multiply
    224.45x = 336.64 × 137.75
  4. Step 4: Simplify right side
    224.45x = 46,371.47
  5. Step 5: Solve for x
    x = 46,371.47/224.45
  6. Step 6: Final answer
    x = 206.60

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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.