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Finding the Fourth Proportional to 481.49, 721.53 and 207.19

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Solution

The fourth proportional to 481.49, 721.53 and 207.19 is: 310.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.49 : 721.53 = 207.19 : x
  2. Step 2: Convert to fraction form
    481.49/721.53 = 207.19/x
  3. Step 3: Cross multiply
    481.49x = 721.53 × 207.19
  4. Step 4: Simplify right side
    481.49x = 149,493.80
  5. Step 5: Solve for x
    x = 149,493.80/481.49
  6. Step 6: Final answer
    x = 310.48

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Double scale
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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.