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Finding the Fourth Proportional to 227.15, 340.63 and 82.79

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Solution

The fourth proportional to 227.15, 340.63 and 82.79 is: 124.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    227.15 : 340.63 = 82.79 : x
  2. Step 2: Convert to fraction form
    227.15/340.63 = 82.79/x
  3. Step 3: Cross multiply
    227.15x = 340.63 × 82.79
  4. Step 4: Simplify right side
    227.15x = 28,200.76
  5. Step 5: Solve for x
    x = 28,200.76/227.15
  6. Step 6: Final answer
    x = 124.15

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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.