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Finding the Fourth Proportional to 548.20, 756.18 and 361.64

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Solution

The fourth proportional to 548.20, 756.18 and 361.64 is: 498.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.20 : 756.18 = 361.64 : x
  2. Step 2: Convert to fraction form
    548.20/756.18 = 361.64/x
  3. Step 3: Cross multiply
    548.20x = 756.18 × 361.64
  4. Step 4: Simplify right side
    548.20x = 273,464.94
  5. Step 5: Solve for x
    x = 273,464.94/548.20
  6. Step 6: Final answer
    x = 498.84

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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.