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Finding the Fourth Proportional to 239.96, 331.44 and 207.20

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Solution

The fourth proportional to 239.96, 331.44 and 207.20 is: 286.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.96 : 331.44 = 207.20 : x
  2. Step 2: Convert to fraction form
    239.96/331.44 = 207.20/x
  3. Step 3: Cross multiply
    239.96x = 331.44 × 207.20
  4. Step 4: Simplify right side
    239.96x = 68,674.37
  5. Step 5: Solve for x
    x = 68,674.37/239.96
  6. Step 6: Final answer
    x = 286.19

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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.