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Finding the Fourth Proportional to 229.15, 315.76 and 212.33

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Solution

The fourth proportional to 229.15, 315.76 and 212.33 is: 292.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.15 : 315.76 = 212.33 : x
  2. Step 2: Convert to fraction form
    229.15/315.76 = 212.33/x
  3. Step 3: Cross multiply
    229.15x = 315.76 × 212.33
  4. Step 4: Simplify right side
    229.15x = 67,042.68
  5. Step 5: Solve for x
    x = 67,042.68/229.15
  6. Step 6: Final answer
    x = 292.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.