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Finding the Fourth Proportional to 178.54, 246.48 and 143.05

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Solution

The fourth proportional to 178.54, 246.48 and 143.05 is: 197.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.54 : 246.48 = 143.05 : x
  2. Step 2: Convert to fraction form
    178.54/246.48 = 143.05/x
  3. Step 3: Cross multiply
    178.54x = 246.48 × 143.05
  4. Step 4: Simplify right side
    178.54x = 35,258.96
  5. Step 5: Solve for x
    x = 35,258.96/178.54
  6. Step 6: Final answer
    x = 197.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.