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Finding the Fourth Proportional to 361.56, 542.40 and 178.97

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Solution

The fourth proportional to 361.56, 542.40 and 178.97 is: 268.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.56 : 542.40 = 178.97 : x
  2. Step 2: Convert to fraction form
    361.56/542.40 = 178.97/x
  3. Step 3: Cross multiply
    361.56x = 542.40 × 178.97
  4. Step 4: Simplify right side
    361.56x = 97,069.72
  5. Step 5: Solve for x
    x = 97,069.72/361.56
  6. Step 6: Final answer
    x = 268.47

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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.