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Finding the Fourth Proportional to 357.16, 535.60 and 220

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Solution

The fourth proportional to 357.16, 535.60 and 220 is: 329.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.16 : 535.60 = 220 : x
  2. Step 2: Convert to fraction form
    357.16/535.60 = 220/x
  3. Step 3: Cross multiply
    357.16x = 535.60 × 220
  4. Step 4: Simplify right side
    357.16x = 117,832
  5. Step 5: Solve for x
    x = 117,832/357.16
  6. Step 6: Final answer
    x = 329.91

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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.