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Finding the Fourth Proportional to 461.22, 691.62 and 187.21

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Solution

The fourth proportional to 461.22, 691.62 and 187.21 is: 280.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.22 : 691.62 = 187.21 : x
  2. Step 2: Convert to fraction form
    461.22/691.62 = 187.21/x
  3. Step 3: Cross multiply
    461.22x = 691.62 × 187.21
  4. Step 4: Simplify right side
    461.22x = 129,478.18
  5. Step 5: Solve for x
    x = 129,478.18/461.22
  6. Step 6: Final answer
    x = 280.73

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