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Finding the Fourth Proportional to 357.85, 535.96 and 213.27

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Solution

The fourth proportional to 357.85, 535.96 and 213.27 is: 319.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.85 : 535.96 = 213.27 : x
  2. Step 2: Convert to fraction form
    357.85/535.96 = 213.27/x
  3. Step 3: Cross multiply
    357.85x = 535.96 × 213.27
  4. Step 4: Simplify right side
    357.85x = 114,304.19
  5. Step 5: Solve for x
    x = 114,304.19/357.85
  6. Step 6: Final answer
    x = 319.42

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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.