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Finding the Fourth Proportional to 236.23, 354.21 and 91.85

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Solution

The fourth proportional to 236.23, 354.21 and 91.85 is: 137.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    236.23 : 354.21 = 91.85 : x
  2. Step 2: Convert to fraction form
    236.23/354.21 = 91.85/x
  3. Step 3: Cross multiply
    236.23x = 354.21 × 91.85
  4. Step 4: Simplify right side
    236.23x = 32,532.07
  5. Step 5: Solve for x
    x = 32,532.07/236.23
  6. Step 6: Final answer
    x = 137.72

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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.