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Finding the Fourth Proportional to 481.01, 661.77 and 428.09

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Solution

The fourth proportional to 481.01, 661.77 and 428.09 is: 588.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.01 : 661.77 = 428.09 : x
  2. Step 2: Convert to fraction form
    481.01/661.77 = 428.09/x
  3. Step 3: Cross multiply
    481.01x = 661.77 × 428.09
  4. Step 4: Simplify right side
    481.01x = 283,293.81
  5. Step 5: Solve for x
    x = 283,293.81/481.01
  6. Step 6: Final answer
    x = 588.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.