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Finding the Fourth Proportional to 481.64, 722.39 and 221.57

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Solution

The fourth proportional to 481.64, 722.39 and 221.57 is: 332.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.64 : 722.39 = 221.57 : x
  2. Step 2: Convert to fraction form
    481.64/722.39 = 221.57/x
  3. Step 3: Cross multiply
    481.64x = 722.39 × 221.57
  4. Step 4: Simplify right side
    481.64x = 160,055.23
  5. Step 5: Solve for x
    x = 160,055.23/481.64
  6. Step 6: Final answer
    x = 332.32

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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.