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Finding the Fourth Proportional to 268.84, 402.90 and 239.92

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Solution

The fourth proportional to 268.84, 402.90 and 239.92 is: 359.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.84 : 402.90 = 239.92 : x
  2. Step 2: Convert to fraction form
    268.84/402.90 = 239.92/x
  3. Step 3: Cross multiply
    268.84x = 402.90 × 239.92
  4. Step 4: Simplify right side
    268.84x = 96,663.77
  5. Step 5: Solve for x
    x = 96,663.77/268.84
  6. Step 6: Final answer
    x = 359.56

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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.