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Finding the Fourth Proportional to 245.05, 367.17 and 172.78

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Solution

The fourth proportional to 245.05, 367.17 and 172.78 is: 258.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.05 : 367.17 = 172.78 : x
  2. Step 2: Convert to fraction form
    245.05/367.17 = 172.78/x
  3. Step 3: Cross multiply
    245.05x = 367.17 × 172.78
  4. Step 4: Simplify right side
    245.05x = 63,439.63
  5. Step 5: Solve for x
    x = 63,439.63/245.05
  6. Step 6: Final answer
    x = 258.88

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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.