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Finding the Fourth Proportional to 227.46, 313.89 and 138.91

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Solution

The fourth proportional to 227.46, 313.89 and 138.91 is: 191.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    227.46 : 313.89 = 138.91 : x
  2. Step 2: Convert to fraction form
    227.46/313.89 = 138.91/x
  3. Step 3: Cross multiply
    227.46x = 313.89 × 138.91
  4. Step 4: Simplify right side
    227.46x = 43,602.46
  5. Step 5: Solve for x
    x = 43,602.46/227.46
  6. Step 6: Final answer
    x = 191.69

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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.