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Finding the Fourth Proportional to 227.80, 341.58 and 81.51

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Solution

The fourth proportional to 227.80, 341.58 and 81.51 is: 122.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    227.80 : 341.58 = 81.51 : x
  2. Step 2: Convert to fraction form
    227.80/341.58 = 81.51/x
  3. Step 3: Cross multiply
    227.80x = 341.58 × 81.51
  4. Step 4: Simplify right side
    227.80x = 27,841.21
  5. Step 5: Solve for x
    x = 27,841.21/227.80
  6. Step 6: Final answer
    x = 122.22

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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.