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Finding the Fourth Proportional to 276.48, 381.43 and 171.53

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Solution

The fourth proportional to 276.48, 381.43 and 171.53 is: 236.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.48 : 381.43 = 171.53 : x
  2. Step 2: Convert to fraction form
    276.48/381.43 = 171.53/x
  3. Step 3: Cross multiply
    276.48x = 381.43 × 171.53
  4. Step 4: Simplify right side
    276.48x = 65,427.21
  5. Step 5: Solve for x
    x = 65,427.21/276.48
  6. Step 6: Final answer
    x = 236.64

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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.