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Finding the Fourth Proportional to 505.80, 759.51 and 217.44

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Solution

The fourth proportional to 505.80, 759.51 and 217.44 is: 326.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.80 : 759.51 = 217.44 : x
  2. Step 2: Convert to fraction form
    505.80/759.51 = 217.44/x
  3. Step 3: Cross multiply
    505.80x = 759.51 × 217.44
  4. Step 4: Simplify right side
    505.80x = 165,147.85
  5. Step 5: Solve for x
    x = 165,147.85/505.80
  6. Step 6: Final answer
    x = 326.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.