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Finding the Fourth Proportional to 227.75, 341.40 and 90.72

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Solution

The fourth proportional to 227.75, 341.40 and 90.72 is: 135.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    227.75 : 341.40 = 90.72 : x
  2. Step 2: Convert to fraction form
    227.75/341.40 = 90.72/x
  3. Step 3: Cross multiply
    227.75x = 341.40 × 90.72
  4. Step 4: Simplify right side
    227.75x = 30,971.81
  5. Step 5: Solve for x
    x = 30,971.81/227.75
  6. Step 6: Final answer
    x = 135.99

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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.