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Finding the Fourth Proportional to 256.26, 383.78 and 132.53

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Solution

The fourth proportional to 256.26, 383.78 and 132.53 is: 198.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    256.26 : 383.78 = 132.53 : x
  2. Step 2: Convert to fraction form
    256.26/383.78 = 132.53/x
  3. Step 3: Cross multiply
    256.26x = 383.78 × 132.53
  4. Step 4: Simplify right side
    256.26x = 50,862.15
  5. Step 5: Solve for x
    x = 50,862.15/256.26
  6. Step 6: Final answer
    x = 198.48

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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.