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Finding the Fourth Proportional to 165.54, 248.72 and 156.33

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Solution

The fourth proportional to 165.54, 248.72 and 156.33 is: 234.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.54 : 248.72 = 156.33 : x
  2. Step 2: Convert to fraction form
    165.54/248.72 = 156.33/x
  3. Step 3: Cross multiply
    165.54x = 248.72 × 156.33
  4. Step 4: Simplify right side
    165.54x = 38,881.62
  5. Step 5: Solve for x
    x = 38,881.62/165.54
  6. Step 6: Final answer
    x = 234.88

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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.