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Finding the Fourth Proportional to 256.96, 385.92 and 184.96

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Solution

The fourth proportional to 256.96, 385.92 and 184.96 is: 277.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    256.96 : 385.92 = 184.96 : x
  2. Step 2: Convert to fraction form
    256.96/385.92 = 184.96/x
  3. Step 3: Cross multiply
    256.96x = 385.92 × 184.96
  4. Step 4: Simplify right side
    256.96x = 71,379.76
  5. Step 5: Solve for x
    x = 71,379.76/256.96
  6. Step 6: Final answer
    x = 277.79

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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.