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Finding the Fourth Proportional to 481.05, 720.08 and 261.13

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Solution

The fourth proportional to 481.05, 720.08 and 261.13 is: 390.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.05 : 720.08 = 261.13 : x
  2. Step 2: Convert to fraction form
    481.05/720.08 = 261.13/x
  3. Step 3: Cross multiply
    481.05x = 720.08 × 261.13
  4. Step 4: Simplify right side
    481.05x = 188,032.36
  5. Step 5: Solve for x
    x = 188,032.36/481.05
  6. Step 6: Final answer
    x = 390.88

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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.