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Finding the Fourth Proportional to 225.72, 336.69 and 218.52

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Solution

The fourth proportional to 225.72, 336.69 and 218.52 is: 325.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.72 : 336.69 = 218.52 : x
  2. Step 2: Convert to fraction form
    225.72/336.69 = 218.52/x
  3. Step 3: Cross multiply
    225.72x = 336.69 × 218.52
  4. Step 4: Simplify right side
    225.72x = 73,573.50
  5. Step 5: Solve for x
    x = 73,573.50/225.72
  6. Step 6: Final answer
    x = 325.95

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.