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Finding the Fourth Proportional to 227.61, 341.31 and 90.63

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Solution

The fourth proportional to 227.61, 341.31 and 90.63 is: 135.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    227.61 : 341.31 = 90.63 : x
  2. Step 2: Convert to fraction form
    227.61/341.31 = 90.63/x
  3. Step 3: Cross multiply
    227.61x = 341.31 × 90.63
  4. Step 4: Simplify right side
    227.61x = 30,932.93
  5. Step 5: Solve for x
    x = 30,932.93/227.61
  6. Step 6: Final answer
    x = 135.90

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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.