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Finding the Fourth Proportional to 225.43, 335.81 and 218.63

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Solution

The fourth proportional to 225.43, 335.81 and 218.63 is: 325.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.43 : 335.81 = 218.63 : x
  2. Step 2: Convert to fraction form
    225.43/335.81 = 218.63/x
  3. Step 3: Cross multiply
    225.43x = 335.81 × 218.63
  4. Step 4: Simplify right side
    225.43x = 73,416.46
  5. Step 5: Solve for x
    x = 73,416.46/225.43
  6. Step 6: Final answer
    x = 325.68

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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.