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Finding the Fourth Proportional to 548.22, 756.34 and 361.80

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Solution

The fourth proportional to 548.22, 756.34 and 361.80 is: 499.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.22 : 756.34 = 361.80 : x
  2. Step 2: Convert to fraction form
    548.22/756.34 = 361.80/x
  3. Step 3: Cross multiply
    548.22x = 756.34 × 361.80
  4. Step 4: Simplify right side
    548.22x = 273,643.81
  5. Step 5: Solve for x
    x = 273,643.81/548.22
  6. Step 6: Final answer
    x = 499.15

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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.