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Finding the Fourth Proportional to 268.65, 402.89 and 171

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Solution

The fourth proportional to 268.65, 402.89 and 171 is: 256.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.65 : 402.89 = 171 : x
  2. Step 2: Convert to fraction form
    268.65/402.89 = 171/x
  3. Step 3: Cross multiply
    268.65x = 402.89 × 171
  4. Step 4: Simplify right side
    268.65x = 68,893.34
  5. Step 5: Solve for x
    x = 68,893.34/268.65
  6. Step 6: Final answer
    x = 256.44

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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.