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Finding the Fourth Proportional to 506.85, 759.90 and 214.30

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Solution

The fourth proportional to 506.85, 759.90 and 214.30 is: 321.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    506.85 : 759.90 = 214.30 : x
  2. Step 2: Convert to fraction form
    506.85/759.90 = 214.30/x
  3. Step 3: Cross multiply
    506.85x = 759.90 × 214.30
  4. Step 4: Simplify right side
    506.85x = 162,846.22
  5. Step 5: Solve for x
    x = 162,846.22/506.85
  6. Step 6: Final answer
    x = 321.29

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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.