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Finding the Fourth Proportional to 268.97, 402.58 and 165.77

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Solution

The fourth proportional to 268.97, 402.58 and 165.77 is: 248.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.97 : 402.58 = 165.77 : x
  2. Step 2: Convert to fraction form
    268.97/402.58 = 165.77/x
  3. Step 3: Cross multiply
    268.97x = 402.58 × 165.77
  4. Step 4: Simplify right side
    268.97x = 66,736.76
  5. Step 5: Solve for x
    x = 66,736.76/268.97
  6. Step 6: Final answer
    x = 248.12

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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.