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Finding the Fourth Proportional to 262.13, 393.17 and 163.31

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Solution

The fourth proportional to 262.13, 393.17 and 163.31 is: 244.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    262.13 : 393.17 = 163.31 : x
  2. Step 2: Convert to fraction form
    262.13/393.17 = 163.31/x
  3. Step 3: Cross multiply
    262.13x = 393.17 × 163.31
  4. Step 4: Simplify right side
    262.13x = 64,205.81
  5. Step 5: Solve for x
    x = 64,205.81/262.13
  6. Step 6: Final answer
    x = 244.94

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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.