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Finding the Fourth Proportional to 245.72, 339.17 and 178.46

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Solution

The fourth proportional to 245.72, 339.17 and 178.46 is: 246.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.72 : 339.17 = 178.46 : x
  2. Step 2: Convert to fraction form
    245.72/339.17 = 178.46/x
  3. Step 3: Cross multiply
    245.72x = 339.17 × 178.46
  4. Step 4: Simplify right side
    245.72x = 60,527.03
  5. Step 5: Solve for x
    x = 60,527.03/245.72
  6. Step 6: Final answer
    x = 246.33

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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.