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Finding the Fourth Proportional to 268.54, 402.55 and 165.87

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Solution

The fourth proportional to 268.54, 402.55 and 165.87 is: 248.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.54 : 402.55 = 165.87 : x
  2. Step 2: Convert to fraction form
    268.54/402.55 = 165.87/x
  3. Step 3: Cross multiply
    268.54x = 402.55 × 165.87
  4. Step 4: Simplify right side
    268.54x = 66,770.97
  5. Step 5: Solve for x
    x = 66,770.97/268.54
  6. Step 6: Final answer
    x = 248.64

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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.