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Finding the Fourth Proportional to 236.62, 354.89 and 74.31

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Solution

The fourth proportional to 236.62, 354.89 and 74.31 is: 111.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    236.62 : 354.89 = 74.31 : x
  2. Step 2: Convert to fraction form
    236.62/354.89 = 74.31/x
  3. Step 3: Cross multiply
    236.62x = 354.89 × 74.31
  4. Step 4: Simplify right side
    236.62x = 26,371.88
  5. Step 5: Solve for x
    x = 26,371.88/236.62
  6. Step 6: Final answer
    x = 111.45

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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.