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Finding the Fourth Proportional to 227.66, 341.48 and 90.81

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Solution

The fourth proportional to 227.66, 341.48 and 90.81 is: 136.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    227.66 : 341.48 = 90.81 : x
  2. Step 2: Convert to fraction form
    227.66/341.48 = 90.81/x
  3. Step 3: Cross multiply
    227.66x = 341.48 × 90.81
  4. Step 4: Simplify right side
    227.66x = 31,009.34
  5. Step 5: Solve for x
    x = 31,009.34/227.66
  6. Step 6: Final answer
    x = 136.21

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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.