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Finding the Fourth Proportional to 261.53, 361.07 and 168.31

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Solution

The fourth proportional to 261.53, 361.07 and 168.31 is: 232.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.53 : 361.07 = 168.31 : x
  2. Step 2: Convert to fraction form
    261.53/361.07 = 168.31/x
  3. Step 3: Cross multiply
    261.53x = 361.07 × 168.31
  4. Step 4: Simplify right side
    261.53x = 60,769.04
  5. Step 5: Solve for x
    x = 60,769.04/261.53
  6. Step 6: Final answer
    x = 232.36

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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.