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Finding the Fourth Proportional to 256.45, 384.92 and 110.29

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Solution

The fourth proportional to 256.45, 384.92 and 110.29 is: 165.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    256.45 : 384.92 = 110.29 : x
  2. Step 2: Convert to fraction form
    256.45/384.92 = 110.29/x
  3. Step 3: Cross multiply
    256.45x = 384.92 × 110.29
  4. Step 4: Simplify right side
    256.45x = 42,452.28
  5. Step 5: Solve for x
    x = 42,452.28/256.45
  6. Step 6: Final answer
    x = 165.54

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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.