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Finding the Fourth Proportional to 357.78, 536.55 and 220.62

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Solution

The fourth proportional to 357.78, 536.55 and 220.62 is: 330.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.78 : 536.55 = 220.62 : x
  2. Step 2: Convert to fraction form
    357.78/536.55 = 220.62/x
  3. Step 3: Cross multiply
    357.78x = 536.55 × 220.62
  4. Step 4: Simplify right side
    357.78x = 118,370.98
  5. Step 5: Solve for x
    x = 118,370.98/357.78
  6. Step 6: Final answer
    x = 330.85

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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.