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Finding the Fourth Proportional to 227.30, 313.68 and 138.77

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Solution

The fourth proportional to 227.30, 313.68 and 138.77 is: 191.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    227.30 : 313.68 = 138.77 : x
  2. Step 2: Convert to fraction form
    227.30/313.68 = 138.77/x
  3. Step 3: Cross multiply
    227.30x = 313.68 × 138.77
  4. Step 4: Simplify right side
    227.30x = 43,529.60
  5. Step 5: Solve for x
    x = 43,529.60/227.30
  6. Step 6: Final answer
    x = 191.51

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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.