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Finding the Fourth Proportional to 261.92, 361.08 and 226.80

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Solution

The fourth proportional to 261.92, 361.08 and 226.80 is: 312.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.92 : 361.08 = 226.80 : x
  2. Step 2: Convert to fraction form
    261.92/361.08 = 226.80/x
  3. Step 3: Cross multiply
    261.92x = 361.08 × 226.80
  4. Step 4: Simplify right side
    261.92x = 81,892.94
  5. Step 5: Solve for x
    x = 81,892.94/261.92
  6. Step 6: Final answer
    x = 312.66

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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.