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Finding the Fourth Proportional to 481.45, 722.16 and 156.81

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Solution

The fourth proportional to 481.45, 722.16 and 156.81 is: 235.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.45 : 722.16 = 156.81 : x
  2. Step 2: Convert to fraction form
    481.45/722.16 = 156.81/x
  3. Step 3: Cross multiply
    481.45x = 722.16 × 156.81
  4. Step 4: Simplify right side
    481.45x = 113,241.91
  5. Step 5: Solve for x
    x = 113,241.91/481.45
  6. Step 6: Final answer
    x = 235.21

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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.