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Finding the Fourth Proportional to 227.79, 341.61 and 90.85

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Solution

The fourth proportional to 227.79, 341.61 and 90.85 is: 136.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    227.79 : 341.61 = 90.85 : x
  2. Step 2: Convert to fraction form
    227.79/341.61 = 90.85/x
  3. Step 3: Cross multiply
    227.79x = 341.61 × 90.85
  4. Step 4: Simplify right side
    227.79x = 31,035.27
  5. Step 5: Solve for x
    x = 31,035.27/227.79
  6. Step 6: Final answer
    x = 136.25

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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.