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Finding the Fourth Proportional to 561.96, 843.48 and 480.96

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Solution

The fourth proportional to 561.96, 843.48 and 480.96 is: 721.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.96 : 843.48 = 480.96 : x
  2. Step 2: Convert to fraction form
    561.96/843.48 = 480.96/x
  3. Step 3: Cross multiply
    561.96x = 843.48 × 480.96
  4. Step 4: Simplify right side
    561.96x = 405,680.14
  5. Step 5: Solve for x
    x = 405,680.14/561.96
  6. Step 6: Final answer
    x = 721.90

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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.