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Finding the Fourth Proportional to 547.55, 755.61 and 361.35

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Solution

The fourth proportional to 547.55, 755.61 and 361.35 is: 498.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.55 : 755.61 = 361.35 : x
  2. Step 2: Convert to fraction form
    547.55/755.61 = 361.35/x
  3. Step 3: Cross multiply
    547.55x = 755.61 × 361.35
  4. Step 4: Simplify right side
    547.55x = 273,039.67
  5. Step 5: Solve for x
    x = 273,039.67/547.55
  6. Step 6: Final answer
    x = 498.66

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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.