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Finding the Fourth Proportional to 436.96, 655.68 and 220.48

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Solution

The fourth proportional to 436.96, 655.68 and 220.48 is: 330.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.96 : 655.68 = 220.48 : x
  2. Step 2: Convert to fraction form
    436.96/655.68 = 220.48/x
  3. Step 3: Cross multiply
    436.96x = 655.68 × 220.48
  4. Step 4: Simplify right side
    436.96x = 144,564.33
  5. Step 5: Solve for x
    x = 144,564.33/436.96
  6. Step 6: Final answer
    x = 330.84

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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.