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Finding the Fourth Proportional to 178.67, 245.30 and 170.78

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Solution

The fourth proportional to 178.67, 245.30 and 170.78 is: 234.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.67 : 245.30 = 170.78 : x
  2. Step 2: Convert to fraction form
    178.67/245.30 = 170.78/x
  3. Step 3: Cross multiply
    178.67x = 245.30 × 170.78
  4. Step 4: Simplify right side
    178.67x = 41,890.25
  5. Step 5: Solve for x
    x = 41,890.25/178.67
  6. Step 6: Final answer
    x = 234.45

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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.