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Finding the Fourth Proportional to 481.85, 722.76 and 157.21

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Solution

The fourth proportional to 481.85, 722.76 and 157.21 is: 235.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.85 : 722.76 = 157.21 : x
  2. Step 2: Convert to fraction form
    481.85/722.76 = 157.21/x
  3. Step 3: Cross multiply
    481.85x = 722.76 × 157.21
  4. Step 4: Simplify right side
    481.85x = 113,625.10
  5. Step 5: Solve for x
    x = 113,625.10/481.85
  6. Step 6: Final answer
    x = 235.81

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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.