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Finding the Fourth Proportional to 272.25, 374.49 and 239.45

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Solution

The fourth proportional to 272.25, 374.49 and 239.45 is: 329.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.25 : 374.49 = 239.45 : x
  2. Step 2: Convert to fraction form
    272.25/374.49 = 239.45/x
  3. Step 3: Cross multiply
    272.25x = 374.49 × 239.45
  4. Step 4: Simplify right side
    272.25x = 89,669.76
  5. Step 5: Solve for x
    x = 89,669.76/272.25
  6. Step 6: Final answer
    x = 329.37

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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.