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Finding the Fourth Proportional to 225.22, 336.98 and 212.87

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Solution

The fourth proportional to 225.22, 336.98 and 212.87 is: 318.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.22 : 336.98 = 212.87 : x
  2. Step 2: Convert to fraction form
    225.22/336.98 = 212.87/x
  3. Step 3: Cross multiply
    225.22x = 336.98 × 212.87
  4. Step 4: Simplify right side
    225.22x = 71,732.93
  5. Step 5: Solve for x
    x = 71,732.93/225.22
  6. Step 6: Final answer
    x = 318.50

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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.