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Finding the Fourth Proportional to 177.75, 243.86 and 172.58

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Solution

The fourth proportional to 177.75, 243.86 and 172.58 is: 236.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    177.75 : 243.86 = 172.58 : x
  2. Step 2: Convert to fraction form
    177.75/243.86 = 172.58/x
  3. Step 3: Cross multiply
    177.75x = 243.86 × 172.58
  4. Step 4: Simplify right side
    177.75x = 42,083.28
  5. Step 5: Solve for x
    x = 42,083.28/177.75
  6. Step 6: Final answer
    x = 236.76

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.