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Finding the Fourth Proportional to 256.85, 354.43 and 166.96

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Solution

The fourth proportional to 256.85, 354.43 and 166.96 is: 230.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    256.85 : 354.43 = 166.96 : x
  2. Step 2: Convert to fraction form
    256.85/354.43 = 166.96/x
  3. Step 3: Cross multiply
    256.85x = 354.43 × 166.96
  4. Step 4: Simplify right side
    256.85x = 59,176.28
  5. Step 5: Solve for x
    x = 59,176.28/256.85
  6. Step 6: Final answer
    x = 230.39

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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.