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Finding the Fourth Proportional to 357.45, 535.38 and 220.08

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Solution

The fourth proportional to 357.45, 535.38 and 220.08 is: 329.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.45 : 535.38 = 220.08 : x
  2. Step 2: Convert to fraction form
    357.45/535.38 = 220.08/x
  3. Step 3: Cross multiply
    357.45x = 535.38 × 220.08
  4. Step 4: Simplify right side
    357.45x = 117,826.43
  5. Step 5: Solve for x
    x = 117,826.43/357.45
  6. Step 6: Final answer
    x = 329.63

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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.