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Finding the Fourth Proportional to 361.92, 542.72 and 115.08

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Solution

The fourth proportional to 361.92, 542.72 and 115.08 is: 172.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.92 : 542.72 = 115.08 : x
  2. Step 2: Convert to fraction form
    361.92/542.72 = 115.08/x
  3. Step 3: Cross multiply
    361.92x = 542.72 × 115.08
  4. Step 4: Simplify right side
    361.92x = 62,453.22
  5. Step 5: Solve for x
    x = 62,453.22/361.92
  6. Step 6: Final answer
    x = 172.56

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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.