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Finding the Fourth Proportional to 506.42, 759.15 and 218.06

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Solution

The fourth proportional to 506.42, 759.15 and 218.06 is: 326.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    506.42 : 759.15 = 218.06 : x
  2. Step 2: Convert to fraction form
    506.42/759.15 = 218.06/x
  3. Step 3: Cross multiply
    506.42x = 759.15 × 218.06
  4. Step 4: Simplify right side
    506.42x = 165,540.25
  5. Step 5: Solve for x
    x = 165,540.25/506.42
  6. Step 6: Final answer
    x = 326.88

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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.