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Finding the Fourth Proportional to 548.90, 757.50 and 352.78

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Solution

The fourth proportional to 548.90, 757.50 and 352.78 is: 486.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.90 : 757.50 = 352.78 : x
  2. Step 2: Convert to fraction form
    548.90/757.50 = 352.78/x
  3. Step 3: Cross multiply
    548.90x = 757.50 × 352.78
  4. Step 4: Simplify right side
    548.90x = 267,230.85
  5. Step 5: Solve for x
    x = 267,230.85/548.90
  6. Step 6: Final answer
    x = 486.85

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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.