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Finding the Fourth Proportional to 268.84, 371.82 and 239.68

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Solution

The fourth proportional to 268.84, 371.82 and 239.68 is: 331.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.84 : 371.82 = 239.68 : x
  2. Step 2: Convert to fraction form
    268.84/371.82 = 239.68/x
  3. Step 3: Cross multiply
    268.84x = 371.82 × 239.68
  4. Step 4: Simplify right side
    268.84x = 89,117.82
  5. Step 5: Solve for x
    x = 89,117.82/268.84
  6. Step 6: Final answer
    x = 331.49

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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.