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Finding the Fourth Proportional to 547.85, 755.75 and 351.21

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Solution

The fourth proportional to 547.85, 755.75 and 351.21 is: 484.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.85 : 755.75 = 351.21 : x
  2. Step 2: Convert to fraction form
    547.85/755.75 = 351.21/x
  3. Step 3: Cross multiply
    547.85x = 755.75 × 351.21
  4. Step 4: Simplify right side
    547.85x = 265,427.84
  5. Step 5: Solve for x
    x = 265,427.84/547.85
  6. Step 6: Final answer
    x = 484.49

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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.