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Finding the Fourth Proportional to 245.31, 367.97 and 74.31

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Solution

The fourth proportional to 245.31, 367.97 and 74.31 is: 111.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.31 : 367.97 = 74.31 : x
  2. Step 2: Convert to fraction form
    245.31/367.97 = 74.31/x
  3. Step 3: Cross multiply
    245.31x = 367.97 × 74.31
  4. Step 4: Simplify right side
    245.31x = 27,344.96
  5. Step 5: Solve for x
    x = 27,344.96/245.31
  6. Step 6: Final answer
    x = 111.47

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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.