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Finding the Fourth Proportional to 436.87, 655.44 and 220.33

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Solution

The fourth proportional to 436.87, 655.44 and 220.33 is: 330.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.87 : 655.44 = 220.33 : x
  2. Step 2: Convert to fraction form
    436.87/655.44 = 220.33/x
  3. Step 3: Cross multiply
    436.87x = 655.44 × 220.33
  4. Step 4: Simplify right side
    436.87x = 144,413.10
  5. Step 5: Solve for x
    x = 144,413.10/436.87
  6. Step 6: Final answer
    x = 330.56

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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.